Channel sink providers are stored in a chain, and the user is responsible for chaining all channel sink providers together before passing the outer one to the channel constructor.

• 信道接收器提供程序存储在一个链中,在向信道构造函数传递外部信道接收器提供程序之前,用户负责将所有的信道接收器提供程序链接在一起。