iOS Enable Visual Labeling

Quick iOS question. We already have an openURL method in our AppDelegate.m file. How do we add Heap? The ‘one-liner’ doesn’t make sense to me, but could someone help?
We have 2 similar methods.
Our current method:
 

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url

  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation

{

  [RNSplashScreen show];

  return [RCTLinkingManager

           application:application openURL:url

           sourceApplication:sourceApplication

           annotation:annotation

         ];

}

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *, id> *) options {

  if ([self.authorizationFlowManagerDelegate resumeExternalUserAgentFlowWithURL:url]) {

    return YES;

  }

  return [RCTLinkingManager application:app openURL:url options:options];

}