public com.google.protobuf.ByteString getPageTokenBytes() {
      java.lang.Object ref = pageToken_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        pageToken_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
A token identifying the page of results to return.

To request the first page results, page_token must be empty. To
request the next page of results, page_token must be the value of
[next_page_token][google.cloud.tasks.v2.ListTasksResponse.next_page_token]
returned from the previous call to
[ListTasks][google.cloud.tasks.v2.CloudTasks.ListTasks] method.

The page token is valid for only 2 hours.
</pre>

<code>string page_token = 4;</code>

@return The bytes for pageToken.
java-tasks/proto-google-cloud-tasks-v2/src/main/java/com/google/cloud/tasks/v2/ListTasksRequest.java