code: public function timeout($timeLimit, $tags, $target)
      {
          $duration = $this->compute($tags, $target);
          return $duration >= $timeLimit;
      }
docs: Checks if the duration of a TimeLine subset reached the timeout
  @param float $timeLimit The time limit against which compare the duration
  @param string|array $tags A tag or a list of tags to filter
  @param int $target The type of target TimePoint to filter
  @return bool Returns true if the timeout is reached
  @throws TimeException