Libraries that needed to move them to another thread passed them as a field to a marshaled callback where they were then wrapped with a generic exception.

如果库需要把它们挪到另一个线程，会通过封送回调的字段传递它们，然后通过一个泛型异常包装它们。

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The inbound representation of the operation request MAY contain a "webhook" field, whose value is a URI where the client expects a callback.

请求操作的入站消息可能包含一个“webhook”域，如果客户端期待回调，该域的值是一个URI；

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