library /*isNonNullableByDefault*/;
import self as self;
import "dart:async" as asy;
import "dart:core" as core;

static method foo(dynamic y) → dynamic /* futureValueType= dynamic */ /* originally async */ {
  final asy::_Future<dynamic> :async_future = new asy::_Future::•<dynamic>();
  core::bool* :is_sync = false;
  dynamic :return_value;
  (dynamic) → dynamic :async_op_then;
  (core::Object, core::StackTrace) → dynamic :async_op_error;
  core::int :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  function :async_op(dynamic :result_or_exception, dynamic :stack_trace) → dynamic yielding 
    try {
      #L1:
      {
        [yield] let dynamic #t1 = asy::_awaitHelper((<X extends core::Object? = dynamic>(() → core::List<X%> x, X% x2) → X% => x2)<FutureOr<dynamic>>(() → core::List<FutureOr<dynamic>> => y as{TypeError,ForDynamic,ForNonNullableByDefault} core::List<FutureOr<dynamic>>, throw 0){(() → core::List<FutureOr<dynamic>?>, FutureOr<dynamic>?) → FutureOr<dynamic>?}, :async_op_then, :async_op_error) in null;
        dynamic a = :result_or_exception;
      }
      asy::_completeWithNoFutureOnAsyncReturn(:async_future, :return_value, :is_sync);
      return;
    }
    on dynamic catch(dynamic exception, core::StackTrace stack_trace) {
      asy::_completeOnAsyncError(:async_future, exception, stack_trace, :is_sync);
    }
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  :async_op(null, null){() → dynamic};
  :is_sync = true;
  return :async_future;
}
static method main() → dynamic {}