If there might be more results than those appearing in this
response, then nextPageToken is included. To get the next
set of results, call this method again using the value of
nextPageToken as pageToken. If a value for
next_page_token appears and the entries field is
empty, it means that the search found no log entries so far
but it did not have time to search all the possible log
entries. Retry the method with this value for page_token
to continue the search. Alternatively, consider speeding up
the search by changing your filter to specify a single log
name or resource type, or to narrow the time range of the
search.