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

static method main() → dynamic {
  core::Object* a;
  core::Object* b;
  return let final core::Set<core::Object*>* #t1 = col::LinkedHashSet::•<core::Object*>() in let final core::bool* #t2 = #t1.{core::Set::add}(let final core::Object* #t3 = a in #t3.{core::Object::==}(null) ?{core::Object*} b : #t3) in #t1;
}