str
If non-empty, more results are available.
Pass this token, along with the same query
parameters as the first request, to view the
next page of results.
time_range_begin
google.protobuf.timestamp_pb2.Timestamp
The timestamp specifies the start time to
which the request was restricted. The start time
is set based on the requested time range. It may
be adjusted to a later time if a project has
exceeded the storage quota and older data has
been deleted.