library test;
import self as self;
import "dart:core" as core;
import "dart:async" as asy;
import "dart:_internal" as _in;

static method id<T extends core::Object = dynamic>(self::id::T x) → self::id::T
  return x;
static method test() → dynamic /* originally async */ {
  final asy::Completer<dynamic> :async_completer = asy::Completer::sync<dynamic>();
  asy::FutureOr<dynamic> :return_value;
  dynamic :async_stack_trace;
  dynamic :async_op_then;
  dynamic :async_op_error;
  dynamic :await_jump_var = 0;
  dynamic :await_ctx_var;
  dynamic :saved_try_context_var0;
  function :async_op([dynamic :result, dynamic :exception, dynamic :stack_trace]) → dynamic yielding 
    try {
      #L1:
      {
        asy::Future<core::String> f;
        [yield] let dynamic #t1 = asy::_awaitHelper(self::id<asy::FutureOr<core::String>>(f), :async_op_then, :async_op_error, :async_op) in null;
        core::String s = _in::unsafeCast<core::String>(:result);
      }
      asy::_completeOnAsyncReturn(:async_completer, :return_value);
      return;
    }
    on dynamic catch(dynamic :exception, dynamic :stack_trace) {
      :async_completer.{asy::Completer::completeError}(:exception, :stack_trace);
    }
  :async_stack_trace = asy::_asyncStackTraceHelper(:async_op);
  :async_op_then = asy::_asyncThenWrapperHelper(:async_op);
  :async_op_error = asy::_asyncErrorWrapperHelper(:async_op);
  asy::Future::microtask<dynamic>(:async_op);
  return :async_completer.{asy::Completer::future};
}
static method main() → dynamic {}