|  | library; | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  | import "dart:collection" as col; | 
|  |  | 
|  | class C extends core::Object { | 
|  | final field core::Set<core::int> s; | 
|  | constructor •(core::List<core::int> ell) → self::C | 
|  | : self::C::s = block { | 
|  | final core::Set<core::int> #t1 = col::LinkedHashSet::•<core::int>(); | 
|  | for (core::int e in ell) | 
|  | if(e.{core::int::isOdd}{core::bool}) | 
|  | #t1.{core::Set::add}{Invariant}(2.{core::num::*}(e){(core::num) → core::int}){(core::int) → core::bool}; | 
|  | } =>#t1, super core::Object::•() | 
|  | ; | 
|  | } | 
|  | static method main() → dynamic {} |