+import { Subject } from './Subject';
+import { Subscriber } from './Subscriber';
+import { Subscription } from './Subscription';
+/**
+ * A variant of Subject that only emits a value when it completes. It will emit
+ * its latest value to all its observers on completion.
+ *
+ * @class AsyncSubject<T>
+ */
+export declare class AsyncSubject<T> extends Subject<T> {
+ private value;
+ private hasNext;
+ private hasCompleted;
+ /** @deprecated This is an internal implementation detail, do not use. */
+ _subscribe(subscriber: Subscriber<any>): Subscription;
+ next(value: T): void;
+ error(error: any): void;
+ complete(): void;
+}