code: protected String getTemplatePath(Response response) {
          return StringUtils.isBlank(response.getTemplate()) ? (this.attachment.getControllerClassName() + "/" + this.attachment.getTemplateEngine().getTemplateName(this.attachment.getControllerMethodName())) : response.getTemplate();
      }
docs: Returns the complete path to the template based on the
  controller and method name
  
  @param response The current response
  
  @return A case-sensitive template path, e.g. /ApplicationController/index.ftl