library;
import self as self;
import "dart:core" as core;
import "dart:async" as asy;

abstract class Sink<T extends core::Object* = dynamic> extends core::Object {
  synthetic constructor •() → self::Sink<self::Sink::T*>*
    : super core::Object::•()
    ;
  abstract method close() → void;
}
abstract class EventSink<T extends core::Object* = dynamic> extends core::Object implements self::Sink<self::EventSink::T*> {
  synthetic constructor •() → self::EventSink<self::EventSink::T*>*
    : super core::Object::•()
    ;
  abstract method close() → void;
}
abstract class StreamConsumer<S extends core::Object* = dynamic> extends core::Object {
  synthetic constructor •() → self::StreamConsumer<self::StreamConsumer::S*>*
    : super core::Object::•()
    ;
  abstract method close() → asy::Future<dynamic>*;
}
abstract class StreamSink<S extends core::Object* = dynamic> extends core::Object implements self::EventSink<self::StreamSink::S*>, self::StreamConsumer<self::StreamSink::S*> {
  synthetic constructor •() → self::StreamSink<self::StreamSink::S*>*
    : super core::Object::•()
    ;
  abstract method close() → asy::Future<dynamic>*;
}
static method main() → dynamic {}