anchor.diff:  
     List<List> _conds;
   
  -  Condition([left = null, right = null, oper = Query.EQUAL, quote = Condition.QUOTE_LEFT]) {
  +  Condition([left = null, right = null, oper = Query.EQUAL, quote = null]) {
       _conds = new List<List<String>>();
       if(null != left) {
         this.add(left, right, oper, quote);
       }
     }
   
  -  static Condition create([left = null, right = null, oper = Query.EQUAL, quote = Condition.QUOTE_LEFT]) {
  +  static Condition create([left = null, right = null, oper = Query.EQUAL, quote = null]) {
       return new Condition(left, right, oper, quote);
     }
   
  
positive.code:     return ands;
    }
  
    Condition addOr(left, [right, oper = Query.EQUAL, quote = Condition.QUOTE_LEFT]) {
      if(null == left) {
        return this;
      }
  
negative.code:     return statement;
    }
  
    Condition add(left, [right, oper = Query.EQUAL, quote = null]) {
      return this.addAnd(left, right, oper, quote);
    }
  
    Condition addAnd(left, [right, oper = Query.EQUAL, quote = null]) {
      if(null == left) {
        return this;
      }
  