docs: private void assureReturnObjFlagSet(SearchControls controls) {
  		Assert.notNull(controls, "controls must not be null");
  		if (!controls.getReturningObjFlag()) {
  			LOG.debug("The returnObjFlag of supplied SearchControls is not set"
                      + " but a ContextMapper is used - setting flag to true");
  			controls.setReturningObjFlag(true);
  		}
  	}