export interface SyncSender<T> {
    /** Sends the given value to this channel. If channel has ended no action. */
    send(value: T): Promise<void>;
    /** Sends the given error to this channel causing the receiver to throw on next(). If channel has ended no action. */
    error(error: Error): Promise<void>;
    /** Ends this channel. */
    end(): Promise<void>;
}