/**
  * Clears the current object, sets all attributes to their default values and removes
  * outgoing references as well as back-references (from other objects to this one. Results probably in a database
  * change of those foreign objects when you call `save` there).
  */
 public function clear()
 {
     if (null !== $this->aAuthor) {
         $this->aAuthor->removeComment($this);
     }
     if (null !== $this->aTarget_Event) {
         $this->aTarget_Event->removeComment($this);
     }
     $this->comment_id = null;
     $this->comment_text = null;
     $this->comment_text_isLoaded = false;
     $this->creation_date = null;
     $this->edit_date = null;
     $this->author_user_id = null;
     $this->target_event_id = null;
     $this->alreadyInSave = false;
     $this->clearAllReferences();
     $this->resetModified();
     $this->setNew(true);
     $this->setDeleted(false);
 }