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

static method main() → dynamic {
  () →* (core::int*) →* core::double* f = () → (core::int*) →* core::double* {
    return (core::int* x) → core::double* {
      return 2.0.{core::double::*}(x);
    };
  };
}