message.trailersDistinct


类似于 message.trailers,但没有连接逻辑,并且值始终是字符串数组,即使对于仅收到一次的标头也是如此。 仅在 'end' 事件中填充。

Similar to message.trailers, but there is no join logic and the values are always arrays of strings, even for headers received just once. Only populated at the 'end' event.