Request message for "LivestreamService.StartChannel".
Required. The name of the channel resource, in the form of:
A request ID to identify requests. Specify a unique request
ID so that if you must retry your request, the server will
know to ignore the request if it has already been completed.
The server will guarantee that for at least 60 minutes since
the first request.
For example, consider a situation where you make an initial
request and the request times out. If you make the request
again with the same request ID, the server can check if
original operation with the same request ID was received,
and if so, will ignore the second request. This prevents
clients from accidentally creating duplicate commitments.
The request ID must be a valid UUID with the exception that
zero UUID is not supported