code: public static Object callMethod(Object obj, String methodName, Object[] args) throws PageException {
  	return callMethod(obj, KeyImpl.getInstance(methodName), args);
      }
docs: calls a Method of a Objct
  
  @param obj Object to call Method on it
  @param methodName Name of the Method to get
  @param args Arguments of the Method to get
  @return return return value of the called Method
  @throws PageException