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

class X extends core::Object {
  synthetic constructor •() → self::X*
    : super core::Object::•()
    ;
}
abstract class Interface extends core::Object {
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:1,getterSelectorId:2]  abstract method takePositional(core::int* unboxedSmi, dynamic unboxedInt, dynamic unboxedDouble, dynamic boxedNullableInt, dynamic boxedNullableDouble, dynamic boxedNonNullableIntOrDouble, dynamic boxedNullableIntOrDouble, dynamic boxedNullableX, dynamic boxedX) → void;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:3,getterSelectorId:4] [@vm.unboxing-info.metadata=(b)->i]  abstract method returnUnboxedSmi(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:5,getterSelectorId:6] [@vm.unboxing-info.metadata=(b)->i]  abstract method returnUnboxedInt(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:7,getterSelectorId:8] [@vm.unboxing-info.metadata=(b)->d]  abstract method returnUnboxedDouble(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:9,getterSelectorId:10]  abstract method returnBoxedNullableInt(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:11,getterSelectorId:12]  abstract method returnBoxedNullableDouble(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:13,getterSelectorId:14]  abstract method returnBoxedIntOrDouble(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:15,getterSelectorId:16]  abstract method returnBoxedNullableIntOrDouble(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:17,getterSelectorId:18]  abstract method returnBoxedNullableX(self::X* ignored) → dynamic;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasNonThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:19,getterSelectorId:20]  abstract method returnBoxedX(self::X* ignored) → dynamic;
}
class Impl1 extends core::Object implements self::Interface {
  synthetic constructor •() → self::Impl1*
    : super core::Object::•()
    ;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:1,getterSelectorId:2]  method takePositional(core::int* unboxedSmi, dynamic unboxedInt, dynamic unboxedDouble, dynamic boxedNullableInt, dynamic boxedNullableDouble, dynamic boxedNonNullableIntOrDouble, dynamic boxedNullableIntOrDouble, dynamic boxedNullableX, dynamic boxedX) → void {
    self::use(unboxedInt);
    self::use(unboxedDouble);
    self::use(boxedNullableInt);
    self::use(boxedNullableDouble);
    self::use(boxedNonNullableIntOrDouble);
    self::use(boxedNullableIntOrDouble);
    self::use(boxedNullableX);
    self::use(boxedX);
  }
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:3,getterSelectorId:4] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedSmi(self::X* ignored) → dynamic
    return 1;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:5,getterSelectorId:6] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedInt(self::X* ignored) → dynamic
    return 1;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:7,getterSelectorId:8] [@vm.unboxing-info.metadata=(b)->d]  method returnUnboxedDouble(self::X* ignored) → dynamic
    return 1.1;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:9,getterSelectorId:10]  method returnBoxedNullableInt(self::X* ignored) → dynamic
    return null;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:11,getterSelectorId:12]  method returnBoxedNullableDouble(self::X* ignored) → dynamic
    return null;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:13,getterSelectorId:14]  method returnBoxedIntOrDouble(self::X* ignored) → dynamic
    return 1;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:15,getterSelectorId:16]  method returnBoxedNullableIntOrDouble(self::X* ignored) → dynamic
    return null;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:17,getterSelectorId:18]  method returnBoxedNullableX(self::X* ignored) → dynamic
    return null;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:19,getterSelectorId:20]  method returnBoxedX(self::X* ignored) → dynamic
    return new self::X::•();
}
class BaseImpl2 extends core::Object {
  synthetic constructor •() → self::BaseImpl2*
    : super core::Object::•()
    ;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:1,getterSelectorId:2]  method takePositional([@vm.inferred-type.metadata=dart.core::_Smi (value: 2)] core::int* unboxedSmi, [@vm.inferred-type.metadata=dart.core::_Smi (value: 2)] dynamic unboxedInt, [@vm.inferred-type.metadata=dart.core::_Double (value: 2.2)] dynamic unboxedDouble, [@vm.inferred-type.metadata=dart.core::_Smi (value: 2)] dynamic boxedNullableInt, [@vm.inferred-type.metadata=dart.core::_Double (value: 2.2)] dynamic boxedNullableDouble, [@vm.inferred-type.metadata=dart.core::_Double (value: 2.2)] dynamic boxedNonNullableIntOrDouble, [@vm.inferred-type.metadata=dart.core::_Smi (value: 2)] dynamic boxedNullableIntOrDouble, [@vm.inferred-type.metadata=#lib::X] dynamic boxedNullableX, [@vm.inferred-type.metadata=#lib::X] dynamic boxedX) → void {
    self::use(unboxedInt);
    self::use(unboxedDouble);
    self::use(boxedNullableInt);
    self::use(boxedNullableDouble);
    self::use(boxedNonNullableIntOrDouble);
    self::use(boxedNullableIntOrDouble);
    self::use(boxedNullableX);
    self::use(boxedX);
  }
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:3,getterSelectorId:4] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedSmi([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:5,getterSelectorId:6] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedInt([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return [@vm.inferred-type.metadata=int] self::mint;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:7,getterSelectorId:8] [@vm.unboxing-info.metadata=(b)->d]  method returnUnboxedDouble([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2.2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:9,getterSelectorId:10]  method returnBoxedNullableInt([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:11,getterSelectorId:12]  method returnBoxedNullableDouble([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2.2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:13,getterSelectorId:14]  method returnBoxedIntOrDouble([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2.2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:15,getterSelectorId:16]  method returnBoxedNullableIntOrDouble([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return 2;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:17,getterSelectorId:18]  method returnBoxedNullableX([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return new self::X::•();
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,hasTearOffUses:false,methodOrSetterSelectorId:19,getterSelectorId:20]  method returnBoxedX([@vm.inferred-type.metadata=dart.core::Null? (value: null)] self::X* ignored) → dynamic
    return new self::X::•();
}
class SubImpl3 extends self::BaseImpl2 implements self::Interface {
  synthetic constructor •() → self::SubImpl3*
    : super self::BaseImpl2::•()
    ;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:1,getterSelectorId:2]  method takePositional(core::int* unboxedSmi, dynamic unboxedInt, dynamic unboxedDouble, dynamic boxedNullableInt, dynamic boxedNullableDouble, dynamic boxedNonNullableIntOrDouble, dynamic boxedNullableIntOrDouble, dynamic boxedNullableX, dynamic boxedX) → void {
    self::use(unboxedInt);
    self::use(unboxedDouble);
    self::use(boxedNullableInt);
    self::use(boxedNullableDouble);
    self::use(boxedNonNullableIntOrDouble);
    self::use(boxedNullableIntOrDouble);
    self::use(boxedNullableX);
    self::use(boxedX);
  }
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:3,getterSelectorId:4] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedSmi(self::X* ignored) → dynamic
    return 3;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:5,getterSelectorId:6] [@vm.unboxing-info.metadata=(b)->i]  method returnUnboxedInt(self::X* ignored) → dynamic
    return [@vm.inferred-type.metadata=int] self::mint;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:7,getterSelectorId:8] [@vm.unboxing-info.metadata=(b)->d]  method returnUnboxedDouble(self::X* ignored) → dynamic
    return 3.3;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:9,getterSelectorId:10]  method returnBoxedNullableInt(self::X* ignored) → dynamic
    return [@vm.inferred-type.metadata=int] self::mint;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:11,getterSelectorId:12]  method returnBoxedNullableDouble(self::X* ignored) → dynamic
    return 3.3;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:13,getterSelectorId:14]  method returnBoxedIntOrDouble(self::X* ignored) → dynamic
    return 3.3;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:15,getterSelectorId:16]  method returnBoxedNullableIntOrDouble(self::X* ignored) → dynamic
    return 3.3;
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:17,getterSelectorId:18]  method returnBoxedNullableX(self::X* ignored) → dynamic
    return new self::X::•();
[@vm.procedure-attributes.metadata=methodOrSetterCalledDynamically:false,getterCalledDynamically:false,hasThisUses:false,methodOrSetterSelectorId:19,getterSelectorId:20]  method returnBoxedX(self::X* ignored) → dynamic
    return new self::X::•();
}
static field dynamic usedObject;
[@vm.unboxing-info.metadata=()->i]static get mint() → core::int*
  return -6144092014192636707;
static method use(dynamic object) → void {
  [@vm.inferred-type.metadata=!? (receiver not int)] self::usedObject.{core::Object::==}(null) ?{dynamic} self::usedObject = object : null;
}
static method main() → dynamic {
  final core::List<core::Object*>* values = <core::Object*>[new self::Impl1::•(), new self::BaseImpl2::•(), new self::SubImpl3::•()];
  final self::Impl1* a = [@vm.direct-call.metadata=dart.core::_GrowableList.[]] [@vm.inferred-type.metadata=!? (skip check)] values.{core::List::[]}([@vm.inferred-type.metadata=int] core::int::parse("0")) as self::Impl1*;
  final self::BaseImpl2* b = [@vm.direct-call.metadata=dart.core::_GrowableList.[]] [@vm.inferred-type.metadata=!? (skip check)] values.{core::List::[]}([@vm.inferred-type.metadata=int] core::int::parse("1")) as self::BaseImpl2*;
  final self::SubImpl3* c = [@vm.direct-call.metadata=dart.core::_GrowableList.[]] [@vm.inferred-type.metadata=!? (skip check)] values.{core::List::[]}([@vm.inferred-type.metadata=int] core::int::parse("2")) as self::SubImpl3*;
  final self::Interface* d = [@vm.direct-call.metadata=dart.core::_GrowableList.[]] [@vm.inferred-type.metadata=!? (skip check)] values.{core::List::[]}([@vm.inferred-type.metadata=int] core::int::parse("2")) as self::Interface*;
  [@vm.direct-call.metadata=#lib::Impl1.takePositional??] [@vm.inferred-type.metadata=!? (skip check)] a.{self::Impl1::takePositional}(1, 1, 1.1, null, null, 1, null, null, new self::X::•());
  b.{self::BaseImpl2::takePositional}(2, 2, 2.2, 2, 2.2, 2.2, 2, new self::X::•(), new self::X::•());
  [@vm.direct-call.metadata=#lib::SubImpl3.takePositional??] [@vm.inferred-type.metadata=!? (skip check)] c.{self::SubImpl3::takePositional}(3, [@vm.inferred-type.metadata=int] self::mint, 3.3, [@vm.inferred-type.metadata=int] self::mint, 3.3, 3.3, 3.3, new self::X::•(), new self::X::•());
  d.{self::Interface::takePositional}(3, [@vm.inferred-type.metadata=int] self::mint, 3.3, [@vm.inferred-type.metadata=int] self::mint, 3.3, 3.3, 3.3, new self::X::•(), new self::X::•());
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnUnboxedSmi] [@vm.inferred-type.metadata=dart.core::_Smi (skip check) (value: 1)] a.{self::Impl1::returnUnboxedSmi}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnUnboxedInt] [@vm.inferred-type.metadata=dart.core::_Smi (skip check) (value: 1)] a.{self::Impl1::returnUnboxedInt}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnUnboxedDouble] [@vm.inferred-type.metadata=dart.core::_Double (skip check) (value: 1.1)] a.{self::Impl1::returnUnboxedDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedNullableInt] [@vm.inferred-type.metadata=dart.core::Null? (skip check) (value: null)] a.{self::Impl1::returnBoxedNullableInt}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedNullableDouble] [@vm.inferred-type.metadata=dart.core::Null? (skip check) (value: null)] a.{self::Impl1::returnBoxedNullableDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedIntOrDouble] [@vm.inferred-type.metadata=dart.core::_Smi (skip check) (value: 1)] a.{self::Impl1::returnBoxedIntOrDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedNullableIntOrDouble] [@vm.inferred-type.metadata=dart.core::Null? (skip check) (value: null)] a.{self::Impl1::returnBoxedNullableIntOrDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedNullableX] [@vm.inferred-type.metadata=dart.core::Null? (skip check) (value: null)] a.{self::Impl1::returnBoxedNullableX}(null));
  self::use([@vm.direct-call.metadata=#lib::Impl1.returnBoxedX] [@vm.inferred-type.metadata=#lib::X (skip check)] a.{self::Impl1::returnBoxedX}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Smi] b.{self::BaseImpl2::returnUnboxedSmi}(null));
  self::use([@vm.inferred-type.metadata=int] b.{self::BaseImpl2::returnUnboxedInt}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double] b.{self::BaseImpl2::returnUnboxedDouble}(null));
  self::use([@vm.inferred-type.metadata=int] b.{self::BaseImpl2::returnBoxedNullableInt}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double] b.{self::BaseImpl2::returnBoxedNullableDouble}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double] b.{self::BaseImpl2::returnBoxedIntOrDouble}(null));
  self::use([@vm.inferred-type.metadata=!] b.{self::BaseImpl2::returnBoxedNullableIntOrDouble}(null));
  self::use([@vm.inferred-type.metadata=#lib::X] b.{self::BaseImpl2::returnBoxedNullableX}(null));
  self::use([@vm.inferred-type.metadata=#lib::X] b.{self::BaseImpl2::returnBoxedX}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnUnboxedSmi] [@vm.inferred-type.metadata=dart.core::_Smi (skip check) (value: 3)] c.{self::SubImpl3::returnUnboxedSmi}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnUnboxedInt] [@vm.inferred-type.metadata=int (skip check)] c.{self::SubImpl3::returnUnboxedInt}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnUnboxedDouble] [@vm.inferred-type.metadata=dart.core::_Double (skip check) (value: 3.3)] c.{self::SubImpl3::returnUnboxedDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedNullableInt] [@vm.inferred-type.metadata=int (skip check)] c.{self::SubImpl3::returnBoxedNullableInt}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedNullableDouble] [@vm.inferred-type.metadata=dart.core::_Double (skip check) (value: 3.3)] c.{self::SubImpl3::returnBoxedNullableDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedIntOrDouble] [@vm.inferred-type.metadata=dart.core::_Double (skip check) (value: 3.3)] c.{self::SubImpl3::returnBoxedIntOrDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedNullableIntOrDouble] [@vm.inferred-type.metadata=dart.core::_Double (skip check) (value: 3.3)] c.{self::SubImpl3::returnBoxedNullableIntOrDouble}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedNullableX] [@vm.inferred-type.metadata=#lib::X (skip check)] c.{self::SubImpl3::returnBoxedNullableX}(null));
  self::use([@vm.direct-call.metadata=#lib::SubImpl3.returnBoxedX] [@vm.inferred-type.metadata=#lib::X (skip check)] c.{self::SubImpl3::returnBoxedX}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Smi] d.{self::Interface::returnUnboxedSmi}(null));
  self::use([@vm.inferred-type.metadata=int] d.{self::Interface::returnUnboxedInt}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double] d.{self::Interface::returnUnboxedDouble}(null));
  self::use([@vm.inferred-type.metadata=int?] d.{self::Interface::returnBoxedNullableInt}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double?] d.{self::Interface::returnBoxedNullableDouble}(null));
  self::use([@vm.inferred-type.metadata=!] d.{self::Interface::returnBoxedIntOrDouble}(null));
  self::use([@vm.inferred-type.metadata=dart.core::_Double?] d.{self::Interface::returnBoxedNullableIntOrDouble}(null));
  self::use([@vm.inferred-type.metadata=#lib::X?] d.{self::Interface::returnBoxedNullableX}(null));
  self::use([@vm.inferred-type.metadata=#lib::X] d.{self::Interface::returnBoxedX}(null));
  self::use(d.{self::Interface::takePositional});
  self::use(d.{self::Interface::returnUnboxedSmi});
  self::use(d.{self::Interface::returnUnboxedInt});
  self::use(d.{self::Interface::returnUnboxedDouble});
  self::use(d.{self::Interface::returnBoxedNullableInt});
  self::use(d.{self::Interface::returnBoxedNullableDouble});
  self::use(d.{self::Interface::returnBoxedIntOrDouble});
  self::use(d.{self::Interface::returnBoxedNullableIntOrDouble});
  self::use(d.{self::Interface::returnBoxedNullableX});
  self::use(d.{self::Interface::returnBoxedX});
}