@Override
 public void onTrimMemory(int level) {
   fragment.onTrimMemory(level);
 }
 @Override
 public void onLowMemory() {
   fragment.onLowMemory();
 }
 @Override
 public void setRequestManager(RequestManager requestManager) {
   fragment.setRequestManager(requestManager);
 }
 @Override
 public ActivityFragmentLifecycle getFragmentLifecycle() {
   return fragment.getLifecycle();
 }
 @Override
 public RequestManager getManager() {
   return fragment.getRequestManager();
 }