/**
  * Save the value submitted by the user in the new changeset
  *
  * @param Tracker_Artifact           $artifact         The artifact
  * @param Tracker_Artifact_Changeset $old_changeset    The old changeset. null if it is the first one
  * @param int                        $new_changeset_id The id of the new changeset
  * @param mixed                      $submitted_value  The value submitted by the user
  * @param boolean $is_submission true if artifact submission, false if artifact update
  *
  * @return bool true if success
  */
 public function saveNewChangeset(Tracker_Artifact $artifact, $old_changeset, $new_changeset_id, $submitted_value, User $submitter, $is_submission = false, $bypass_permissions = false)
 {
     $submitted_value = $this->updateLinkingDirection($artifact, $old_changeset, $submitted_value, $submitter);
     return parent::saveNewChangeset($artifact, $old_changeset, $new_changeset_id, $submitted_value, $submitter, $is_submission, $bypass_permissions);
 }