这是不需要的协议，因此并不废止互操作性。
Which is not required by the protocol, and so does not invalidate interoperability.
正如 Hawkeye 的协议所指，付费版本仅仅多提供了两个额外的功能，99%的开发者真的不需要。
As specified in the licence of Hawkeye, the paid version only offers you two extra functionalities that 99% of developers don't really need.
交互参与者不需要使用相同的通信协议或交互模式。
Interacting participants need not use the same communication protocol or interaction pattern.
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