/**
  * Adds the given issue to the concrete tracker implementation.
  *
  * @param Issue $issue
  * @return void
  */
 public function addIssue(Issue $issue)
 {
     echo "Sync to PivotalTracker: ", $issue->title, PHP_EOL;
     $this->pivotal->addStory('bug', $issue->title, $issue->body);
 }