Use of undeclared identifier 'FCMNotificationReceived'

_Below_ is my code. I'm Receiving the error "Use of undeclared identifier 'FCMNotificationReceived'" on the lines marked in _**Bold**_.
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/

#import "AppDelegate.h"
#import

#import "RCTBundleURLProvider.h"
#import "RCTRootView.h"
@import Firebase;
#import "RNFIRMessaging.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;

#ifdef DEBUG
jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];
#else
jsCodeLocation = [CodePush bundleURL];
#endif

RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"seller_app"
initialProperties:nil
launchOptions:launchOptions];
rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
UIViewController *rootViewController = [UIViewController new];
rootViewController.view = rootView;
self.window.rootViewController = rootViewController;
[self.window makeKeyAndVisible];
[FIRApp configure];
#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
[[UNUserNotificationCenter currentNotificationCenter] setDelegate:self];
#endif
return YES;
}

#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler
{
_**[[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:notification.request.content.userInfo];**_
if([[notification.request.content.userInfo valueForKey:@"show_in_foreground"] isEqual:@YES]){
completionHandler(UNNotificationPresentationOptionAlert | UNNotificationPresentationOptionBadge | UNNotificationPresentationOptionSound);
}else{
completionHandler(UNNotificationPresentationOptionNone);
}
}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler
{
NSDictionary* userInfo = [[NSMutableDictionary alloc] initWithDictionary: response.notification.request.content.userInfo];
[userInfo setValue:@YES forKey:@"opened_from_tray"];
_**[[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:userInfo];**_
}

#else
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
[[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self + userInfo:notification.userInfo];
}
#endif

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(nonnull NSDictionary *)userInfo fetchCompletionHandler:(nonnull void (^)(UIBackgroundFetchResult))completionHandler{
_

**[[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:userInfo];**

_
completionHandler(UIBackgroundFetchResultNoData);
}
@end

RN version : 0.52.1
react-native-fcm version : ^11.3.1
Using xcode
App is not running?