     /**
      @brief String to filter by
      */
-    private var filterString: String?
+    fileprivate var filterString: String?
 
     /**
      @brief String that has been sent to the showMentionsListWithString

     @brief Mutable array list of mentions managed by listener, accessible via the
     public mentions property.
     */
    private var mutableMentions: [SZMention] = []

    /**
     @brief Range of mention currently being edited.
     */
    private var currentMentionRange: NSRange?

    /**
     @brief Whether or not we are currently editing a mention.

        mentionsTextView.delegate = self
    }

    /**
     @brief Resets the empty text view
     @param textView: the text view to reset
