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.