code: @Override
  	public String cleanArg(String arg) {
  		String angularvar = "(,\"\\$\\$\\w+\":\".*\")";
  		return arg.replaceAll(angularvar, "");
  	}
docs: Method allow cleaning all extra fields on arguments from framework web For sample angularjs add some variables begin $$ So replace : ,"$$hashKey":"object:\d"
  
  @param arg
  @return