docs: public void setDateHeader(String name, long t) {
          // 311717
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE)) {  //306998.15
              logger.entering(CLASS_NAME,"setDateHeader", " name --> " + name + " value --> " + String.valueOf(t)+ " ["+this+"]");
          }
          // d151464 - check the include flag
          WebAppDispatcherContext dispatchContext = (WebAppDispatcherContext) getRequest().getWebAppDispatcherContext();
          if (dispatchContext.isInclude() == true) {
              if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE)) {  //306998.15
                  logger.logp(Level.FINE,CLASS_NAME,"setDateHeader", nls.getString("Illegal.from.included.servlet", "Illegal from included servlet"));  //311717
              }
          }
          else {
              // d128646 - if we're not ignoring state errors and response is committed or closed, throw an exception
              if (!_ignoreStateErrors && isCommitted()) {
                  // log a warning (only the first time)...ignore headers set after response is committed
                  IServletWrapper wrapper = dispatchContext.getCurrentServletReference();
                  if (logWarningActionNow(wrapper)) {
                      logAlreadyCommittedWarning(new Throwable(), "setDateHeader");
                  } else {
                      logger.logp(Level.FINE, CLASS_NAME,"setDateHeader", "Cannot set header.  Response already committed.");
                  }
                  
                  if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE)) {  //306998.15
                      logger.exiting(CLASS_NAME,"setDateHeader","Response already committed");
                  }
                  return;
              }
  
              // _header.setDateField(name, t);
              _response.setDateHeader(name, t);
          }
          if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE)) {  //306998.15
              logger.exiting(CLASS_NAME,"setDateHeader");
          }
      }