code: public TemplateClass __getTemplateClass(boolean useCaller) {
          TemplateClass tc = __templateClass;
          if (useCaller && null == tc) {
              TemplateBase caller = __caller();
              if (null != caller) return caller.__getTemplateClass(true);
          }
          return tc;
      }
docs: Get the template class of this template. Not to be used in user application or template
  
  @param useCaller
  @return a <code>TemplateClass</code>