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

static method main() → dynamic {
  () →* core::Iterable<core::Null*>* f = () → core::Iterable<core::Null*>* /* originally sync* */ {
    dynamic :await_jump_var = 0;
    dynamic :await_ctx_var;
    function :sync_op(core::_SyncIterator<core::Null*>* :iterator) → core::bool* yielding {
      {
        {
          :iterator.{core::_SyncIterator::_current} = null;
          [yield] true;
        }
      }
      return false;
    }
    return new core::_SyncIterable::•<core::Null*>(:sync_op);
  };
  core::Iterable<dynamic>* y = f.call();
  core::Iterable<core::String*>* z = f.call();
  core::String* s = f.call().{core::Iterable::first};
}