code: RamResourceCore getCore(String path) {
  	String[] names = ListUtil.listToStringArray(path, '/');
  
  	RamResourceCore rrc = root;
  	for (int i = 0; i < names.length; i++) {
  	    rrc = rrc.getChild(names[i], caseSensitive);
  	    if (rrc == null) return null;
  	}
  	return rrc;
      }
docs: returns core for this path if exists, otherwise return null
  
  @param path
  @return core or null