The ListNotificationChannelDescriptors request.
.. attribute:: name
Required. The REST resource name of the parent from which to
retrieve the notification channel descriptors. The expected
syntax is: :: projects/[PROJECT_ID_OR_NUMBER] Note that
this names the parent container in which to look for the
descriptors; to retrieve a single descriptor by name, use the
[GetNotificationChannelDescriptor][google.monitoring.v3.Notifi
cationChannelService.GetNotificationChannelDescriptor]
operation, instead.
If non-empty, page_token must contain a value returned as
the next_page_token in a previous response to request the
next set of results.
