code: private String buildFunctionCallCode(String functionName, int args) {
      StringBuilder functionCall = new StringBuilder();
      functionCall.append(SCRIPT_METHODS_OBJECT).append(".").append(functionName)
      .append("(");
      for (int i = 0; i < args; i++) {
        if (i > 0) {
          functionCall.append(",");
        }
        functionCall.append("arg").append(i);
      }
      functionCall.append(")");
      return functionCall.toString();
    }
docs: ***********************************************************************
  Builds a JavaScript code snippet to call a function that we bind.
  
  @param functionName
  of the bound function
  @param args
  of the bound function
  @return the JS code to invoke the method.
  **********************************************************************