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

static method returnFutureOfVoid() → asy::Future<void> async 
  ;
static method returnVoid() → void
  ;
static method returnVoidAsync() → void async 
  ;
static method test() → dynamic async 
  ;
static method main() → dynamic async 
  ;