code: private void initBracketMap() {
  		escMap.put("(", "-LRB-");
  		escMap.put(")", "-RRB-");
  		escMap.put("{", "-LCB-");
  		escMap.put("}", "-RCB-");
  		escMap.put("[", "-LSB-");
  		escMap.put("]", "-RSB-");
  	}
docs: init table with charactets to be escaped