/**
 * A common interface for controllable streams.
 *
 * @group Sources
 */
export interface Controllable<T> extends ReadableStreamDefaultController<T> {
    /**
     * Register a pull subscriber.
     *
     * When the stream is ready to pull it will pull from all
     * subscribers until the desired size has been fulfilled.
     */
    onPull(pullListener: ControllerPullListener<T>): () => void;
}
/**
 * The pull listener type for controllables.
 *
 * @group Sources
 */
export interface ControllerPullListener<T> {
    (): T | Promise<T> | undefined;
}
/**
 * An interface for a {@link ControllableStream:class}.
 *
 * @group Sources
 */
export interface ControllableReadableStream<T> extends ReadableStream<T>, Controllable<T> {
}