library;
import self as self;
import "dart:core" as core;

class Class extends core::Object {
  field self::Class? _field = null;
  synthetic constructor •() → self::Class*
    : super core::Object::•()
    ;
}
extension Extension on self::Class {
  get field = self::Extension|get#field;
  method method = self::Extension|method;
  tearoff method = self::Extension|get#method;
  operator [] = self::Extension|[];
  operator []= = self::Extension|[]=;
  operator + = self::Extension|+;
  operator unary- = self::Extension|unary-;
  set field = self::Extension|set#field;
}
static method Extension|get#field(final self::Class #this) → self::Class?
  return #this.{self::Class::_field};
static method Extension|set#field(final self::Class #this, self::Class? value) → void {
  #this.{self::Class::_field} = value;
}
static method Extension|method(final self::Class #this) → self::Class?
  return self::Extension|get#field(#this);
static method Extension|get#method(final self::Class #this) → () →* self::Class?
  return () → self::Class? => self::Extension|method(#this);
static method Extension|[](final self::Class #this, self::Class? key) → self::Class?
  return self::Extension|get#field(#this);
static method Extension|[]=(final self::Class #this, self::Class? key, self::Class? value) → void {
  self::Extension|set#field(#this, value);
}
static method Extension|+(final self::Class #this, core::int value) → self::Class?
  return self::Extension|get#field(#this);
static method Extension|unary-(final self::Class #this) → self::Class?
  return self::Extension|get#field(#this);
static method main() → dynamic {
  self::propertyAccess(null);
  self::indexAccess(null);
  self::operatorAccess(null);
  self::ifNull(null);
}
static method propertyAccess(self::Class? c) → void {
  let final self::Class? #t1 = c in #t1.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(#t1);
  let final self::Class? #t2 = c in #t2.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(#t2, new self::Class::•());
  c = let final self::Class? #t3 = c in #t3.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t4 = new self::Class::•() in let final void #t5 = self::Extension|set#field(#t3, #t4) in #t4;
  let final self::Class? #t6 = c in #t6.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(#t6);
  let final self::Class? #t7 = c in #t7.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|get#field(#t7));
  let final self::Class? #t8 = c in #t8.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|get#field(#t8), new self::Class::•());
  self::throws(() → self::Class? => self::Extension|get#field(let final self::Class? #t9 = c in #t9.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(#t9)));
  self::throws(() → self::Class? => self::Extension|get#field(let final self::Class? #t10 = c in #t10.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t11 = new self::Class::•() in let final void #t12 = self::Extension|set#field(#t10, #t11) in #t11));
  self::throws(() → self::Class? => self::Extension|get#field(let final self::Class? #t13 = c in #t13.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(#t13)));
  c = let final self::Class? #t14 = c in #t14.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t15 = new self::Class::•() in let final void #t16 = self::Extension|set#field(self::Extension|get#field(#t14), #t15) in #t15;
  let final self::Class? #t17 = c in #t17.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|get#field(#t17));
  let final self::Class? #t18 = c in #t18.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t18, self::Extension|get#field(new self::Class::•()));
  c = let final self::Class? #t19 = c in #t19.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t20 = self::Extension|get#field(new self::Class::•()) in let final void #t21 = self::Extension|set#field(#t19, #t20) in #t20;
  let final self::Class? #t22 = c in #t22.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(#t22, let final self::Class* #t23 = new self::Class::•() in let final void #t24 = self::Extension|set#field(new self::Class::•(), #t23) in #t23);
  c = let final self::Class? #t25 = c in #t25.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t26 = let final self::Class* #t27 = new self::Class::•() in let final void #t28 = self::Extension|set#field(new self::Class::•(), #t27) in #t27 in let final void #t29 = self::Extension|set#field(#t25, #t26) in #t26;
  let final self::Class? #t30 = c in #t30.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t30, self::Extension|method(new self::Class::•()));
  c = let final self::Class? #t31 = c in #t31.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t32 = self::Extension|method(new self::Class::•()) in let final void #t33 = self::Extension|set#field(#t31, #t32) in #t32;
  let final self::Class? #t34 = c in #t34.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|method(#t34));
  let final self::Class? #t35 = c in #t35.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|method(#t35), new self::Class::•());
  let final self::Class? #t36 = c in #t36.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|method(#t36));
  let final self::Class? #t37 = c in #t37.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|get#field(self::Extension|get#field(#t37)));
  let final self::Class? #t38 = c in #t38.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|get#field(self::Extension|get#field(#t38)), new self::Class::•());
  c = let final self::Class? #t39 = c in #t39.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t40 = new self::Class::•() in let final void #t41 = self::Extension|set#field(self::Extension|get#field(self::Extension|get#field(#t39)), #t40) in #t40;
  let final self::Class? #t42 = c in #t42.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|get#field(self::Extension|get#field(#t42)));
  let final self::Class? #t43 = c in #t43.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t43, self::Extension|get#field(self::Extension|get#field(new self::Class::•())));
  c = let final self::Class? #t44 = c in #t44.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t45 = self::Extension|get#field(self::Extension|get#field(new self::Class::•())) in let final void #t46 = self::Extension|set#field(#t44, #t45) in #t45;
  let final self::Class? #t47 = c in #t47.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(#t47, let final self::Class* #t48 = new self::Class::•() in let final void #t49 = self::Extension|set#field(self::Extension|get#field(new self::Class::•()), #t48) in #t48);
  c = let final self::Class? #t50 = c in #t50.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t51 = let final self::Class* #t52 = new self::Class::•() in let final void #t53 = self::Extension|set#field(self::Extension|get#field(new self::Class::•()), #t52) in #t52 in let final void #t54 = self::Extension|set#field(#t50, #t51) in #t51;
  let final self::Class? #t55 = c in #t55.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t55, self::Extension|method(self::Extension|get#field(new self::Class::•())));
  c = let final self::Class? #t56 = c in #t56.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t57 = self::Extension|method(self::Extension|get#field(new self::Class::•())) in let final void #t58 = self::Extension|set#field(#t56, #t57) in #t57;
  let final self::Class? #t59 = c in #t59.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|get#field(self::Extension|method(#t59)));
  let final self::Class? #t60 = c in #t60.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|get#field(self::Extension|method(#t60)), new self::Class::•());
  let final self::Class? #t61 = c in #t61.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|get#field(self::Extension|method(#t61)));
  let final self::Class? #t62 = c in #t62.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(self::Extension|get#field(#t62), self::Extension|get#field(new self::Class::•()));
  c = let final self::Class? #t63 = c in #t63.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t64 = self::Extension|get#field(new self::Class::•()) in let final void #t65 = self::Extension|set#field(self::Extension|get#field(#t63), #t64) in #t64;
  let final self::Class? #t66 = c in #t66.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|get#field(#t66), let final self::Class* #t67 = new self::Class::•() in let final void #t68 = self::Extension|set#field(new self::Class::•(), #t67) in #t67);
  c = let final self::Class? #t69 = c in #t69.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t70 = let final self::Class* #t71 = new self::Class::•() in let final void #t72 = self::Extension|set#field(new self::Class::•(), #t71) in #t71 in let final void #t73 = self::Extension|set#field(self::Extension|get#field(#t69), #t70) in #t70;
  let final self::Class? #t74 = c in #t74.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(self::Extension|get#field(#t74), self::Extension|method(new self::Class::•()));
  c = let final self::Class? #t75 = c in #t75.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t76 = self::Extension|method(new self::Class::•()) in let final void #t77 = self::Extension|set#field(self::Extension|get#field(#t75), #t76) in #t76;
  let final self::Class? #t78 = c in #t78.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t78, let final self::Class? #t79 = self::Extension|get#field(new self::Class::•()) in let final void #t80 = self::Extension|set#field(new self::Class::•(), #t79) in #t79);
  c = let final self::Class? #t81 = c in #t81.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t82 = let final self::Class? #t83 = self::Extension|get#field(new self::Class::•()) in let final void #t84 = self::Extension|set#field(new self::Class::•(), #t83) in #t83 in let final void #t85 = self::Extension|set#field(#t81, #t82) in #t82;
  let final self::Class? #t86 = c in #t86.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(#t86, let final self::Class* #t87 = let final self::Class* #t88 = new self::Class::•() in let final void #t89 = self::Extension|set#field(new self::Class::•(), #t88) in #t88 in let final void #t90 = self::Extension|set#field(new self::Class::•(), #t87) in #t87);
  c = let final self::Class? #t91 = c in #t91.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t92 = let final self::Class* #t93 = let final self::Class* #t94 = new self::Class::•() in let final void #t95 = self::Extension|set#field(new self::Class::•(), #t94) in #t94 in let final void #t96 = self::Extension|set#field(new self::Class::•(), #t93) in #t93 in let final void #t97 = self::Extension|set#field(#t91, #t92) in #t92;
  let final self::Class? #t98 = c in #t98.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t98, let final self::Class? #t99 = self::Extension|method(new self::Class::•()) in let final void #t100 = self::Extension|set#field(new self::Class::•(), #t99) in #t99);
  c = let final self::Class? #t101 = c in #t101.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t102 = let final self::Class? #t103 = self::Extension|method(new self::Class::•()) in let final void #t104 = self::Extension|set#field(new self::Class::•(), #t103) in #t103 in let final void #t105 = self::Extension|set#field(#t101, #t102) in #t102;
  let final self::Class? #t106 = c in #t106.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(self::Extension|method(#t106), self::Extension|get#field(new self::Class::•()));
  c = let final self::Class? #t107 = c in #t107.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t108 = self::Extension|get#field(new self::Class::•()) in let final void #t109 = self::Extension|set#field(self::Extension|method(#t107), #t108) in #t108;
  let final self::Class? #t110 = c in #t110.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|method(#t110), let final self::Class* #t111 = new self::Class::•() in let final void #t112 = self::Extension|set#field(new self::Class::•(), #t111) in #t111);
  c = let final self::Class? #t113 = c in #t113.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t114 = let final self::Class* #t115 = new self::Class::•() in let final void #t116 = self::Extension|set#field(new self::Class::•(), #t115) in #t115 in let final void #t117 = self::Extension|set#field(self::Extension|method(#t113), #t114) in #t114;
  let final self::Class? #t118 = c in #t118.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(self::Extension|method(#t118), self::Extension|method(new self::Class::•()));
  c = let final self::Class? #t119 = c in #t119.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t120 = self::Extension|method(new self::Class::•()) in let final void #t121 = self::Extension|set#field(self::Extension|method(#t119), #t120) in #t120;
  let final self::Class? #t122 = c in #t122.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|method(self::Extension|get#field(#t122)));
  let final self::Class? #t123 = c in #t123.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|method(self::Extension|get#field(#t123)), new self::Class::•());
  c = let final self::Class? #t124 = c in #t124.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t125 = new self::Class::•() in let final void #t126 = self::Extension|set#field(self::Extension|method(self::Extension|get#field(#t124)), #t125) in #t125;
  let final self::Class? #t127 = c in #t127.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|method(self::Extension|get#field(#t127)));
  let final self::Class? #t128 = c in #t128.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t128, self::Extension|get#field(self::Extension|method(new self::Class::•())));
  c = let final self::Class? #t129 = c in #t129.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t130 = self::Extension|get#field(self::Extension|method(new self::Class::•())) in let final void #t131 = self::Extension|set#field(#t129, #t130) in #t130;
  let final self::Class? #t132 = c in #t132.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(#t132, let final self::Class* #t133 = new self::Class::•() in let final void #t134 = self::Extension|set#field(self::Extension|method(new self::Class::•()), #t133) in #t133);
  c = let final self::Class? #t135 = c in #t135.{core::Object::==}(null) ?{self::Class*} null : let final self::Class* #t136 = let final self::Class* #t137 = new self::Class::•() in let final void #t138 = self::Extension|set#field(self::Extension|method(new self::Class::•()), #t137) in #t137 in let final void #t139 = self::Extension|set#field(#t135, #t136) in #t136;
  let final self::Class? #t140 = c in #t140.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t140, self::Extension|method(self::Extension|method(new self::Class::•())));
  c = let final self::Class? #t141 = c in #t141.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t142 = self::Extension|method(self::Extension|method(new self::Class::•())) in let final void #t143 = self::Extension|set#field(#t141, #t142) in #t142;
  let final self::Class? #t144 = c in #t144.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(self::Extension|method(self::Extension|method(#t144)));
  let final self::Class? #t145 = c in #t145.{core::Object::==}(null) ?{self::Class*} null : self::Extension|set#field(self::Extension|method(self::Extension|method(#t145)), new self::Class::•());
  let final self::Class? #t146 = c in #t146.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|method(self::Extension|method(#t146)));
}
static method indexAccess(self::Class? c) → void {
  let final self::Class? #t147 = c in #t147.{core::Object::==}(null) ?{self::Class?} null : self::Extension|[](self::Extension|get#field(#t147), c);
  let final self::Class? #t148 = c in #t148.{core::Object::==}(null) ?{self::Class*} null : self::Extension|[]=(self::Extension|get#field(#t148), c, new self::Class::•());
  c = let final self::Class? #t149 = c in #t149.{core::Object::==}(null) ?{self::Class*} null : let final self::Class? #t150 = self::Extension|get#field(#t149) in let final self::Class? #t151 = c in let final self::Class* #t152 = new self::Class::•() in let final void #t153 = self::Extension|[]=(#t150, #t151, #t152) in #t152;
  let final self::Class? #t154 = c in #t154.{core::Object::==}(null) ?{self::Class?} null : self::Extension|method(self::Extension|[](self::Extension|get#field(#t154), c));
  let final self::Class? #t155 = c in #t155.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t156 = self::Extension|get#field(#t155) in let final self::Class? #t157 = c in self::Extension|[]=(#t156, #t157, self::Extension|+(self::Extension|[](#t156, #t157), 0));
  c = let final self::Class? #t158 = c in #t158.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t159 = self::Extension|get#field(#t158) in let final self::Class? #t160 = c in let final self::Class? #t161 = self::Extension|+(self::Extension|[](#t159, #t160), 0) in let final void #t162 = self::Extension|[]=(#t159, #t160, #t161) in #t161;
  let final self::Class? #t163 = c in #t163.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t164 = self::Extension|get#field(#t163) in let final self::Class? #t165 = c in self::Extension|[]=(#t164, #t165, self::Extension|+(self::Extension|[](#t164, #t165), 1));
  c = let final self::Class? #t166 = c in #t166.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t167 = self::Extension|get#field(#t166) in let final self::Class? #t168 = c in let final self::Class? #t169 = self::Extension|[](#t167, #t168) in let final void #t170 = self::Extension|[]=(#t167, #t168, self::Extension|+(#t169, 1)) in #t169;
  let final self::Class? #t171 = c in #t171.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t172 = self::Extension|get#field(#t171) in let final self::Class? #t173 = c in let final self::Class? #t174 = self::Extension|+(self::Extension|[](#t172, #t173), 1) in let final void #t175 = self::Extension|[]=(#t172, #t173, #t174) in #t174;
  c = let final self::Class? #t176 = c in #t176.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t177 = self::Extension|get#field(#t176) in let final self::Class? #t178 = c in let final self::Class? #t179 = self::Extension|+(self::Extension|[](#t177, #t178), 1) in let final void #t180 = self::Extension|[]=(#t177, #t178, #t179) in #t179;
}
static method operatorAccess(self::Class? c) → void {
  self::throws(() → self::Class? => self::Extension|+(let final self::Class? #t181 = c in #t181.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(#t181), 0));
  self::throws(() → self::Class? => self::Extension|unary-(let final self::Class? #t182 = c in #t182.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(#t182)));
  let final self::Class? #t183 = c in #t183.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t183, self::Extension|+(self::Extension|get#field(#t183), 0));
  c = let final self::Class? #t184 = c in #t184.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t185 = self::Extension|+(self::Extension|get#field(#t184), 0) in let final void #t186 = self::Extension|set#field(#t184, #t185) in #t185;
  let final self::Class? #t187 = c in #t187.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t188 = self::Extension|get#field(#t187) in self::Extension|set#field(#t188, self::Extension|+(self::Extension|get#field(#t188), 0));
  c = let final self::Class? #t189 = c in #t189.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t190 = self::Extension|get#field(#t189) in let final self::Class? #t191 = self::Extension|+(self::Extension|get#field(#t190), 0) in let final void #t192 = self::Extension|set#field(#t190, #t191) in #t191;
  let final self::Class? #t193 = c in #t193.{core::Object::==}(null) ?{self::Class?} null : self::Extension|set#field(#t193, self::Extension|+(self::Extension|get#field(#t193), 1));
  c = let final self::Class? #t194 = c in #t194.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t195 = self::Extension|get#field(#t194) in let final self::Class? #t196 = let final self::Class? #t197 = self::Extension|+(#t195, 1) in let final void #t198 = self::Extension|set#field(#t194, #t197) in #t197 in #t195;
  let final self::Class? #t199 = c in #t199.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t200 = self::Extension|+(self::Extension|get#field(#t199), 1) in let final void #t201 = self::Extension|set#field(#t199, #t200) in #t200;
  c = let final self::Class? #t202 = c in #t202.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t203 = self::Extension|+(self::Extension|get#field(#t202), 1) in let final void #t204 = self::Extension|set#field(#t202, #t203) in #t203;
}
static method ifNull(self::Class? c) → void {
  let final self::Class? #t205 = c in #t205.{core::Object::==}(null) ?{self::Class?} null : self::Extension|get#field(#t205).{core::Object::==}(null) ?{self::Class?} self::Extension|set#field(#t205, c) : null;
  c = let final self::Class? #t206 = c in #t206.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t207 = self::Extension|get#field(#t206) in #t207.{core::Object::==}(null) ?{self::Class?} let final self::Class? #t208 = c in let final void #t209 = self::Extension|set#field(#t206, #t208) in #t208 : #t207;
  let final self::Class? #t210 = c in #t210.{core::Object::==}(null) ?{self::Class?} null : let final self::Class? #t211 = self::Extension|get#field(#t210) in let final self::Class? #t212 = c in self::Extension|[](#t211, #t212).{core::Object::==}(null) ?{self::Class?} self::Extension|[]=(#t211, #t212, c) : null;
}
static method throws(() → void f) → void {
  try {
    f.call();
  }
  on dynamic catch(final dynamic _) {
    return;
  }
  throw "Expected exception.";
}