anchor.diff:    String _repeatingSuffix = "";
   
     /**
  -   * Convert the expression to class. "[a-z]" -> [a-z] [a-z]{1, 2}
  +   * Convert the expression to class. "[a-z]" -> "[a-z]{1, 2}"
      */
     repeat({int count : 0, int minCount : 0, int maxCount : 0}) {
       if (count > 0) {
  
positive.code:   }
  
    /**
     * Repeat least once. [a-z] -> [a-z]+
     */
    repeatLeastOnce() {
      _repeatingSuffix += "+";
    }
  
    /**
     * Maybe exists. [a-z] -> [a-z]?
     */
    maybe() {
      _repeatingSuffix += "?";
  
negative.code: part of objective_regex;
  
  /**
   * Regex pattern object
   */
  class RPattern {
  
  