text: // Copyright 2020 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #import <AppAuth/AppAuth.h>
  #import "FIRAppDistribution.h"
  
  #define STR(x) STR_EXPAND(x)
  #define STR_EXPAND(x) #x
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface FIRAppDistribution ()
  /**
   * Current view controller presenting the `SFSafariViewController` if any.
   */
  @property(nullable, nonatomic) UIViewController *safariHostingViewController;
  
  /**
   * Current auth state for app distribution tester
   */
  @property(nullable, nonatomic) OIDAuthState *authState;
  
  @property(nullable, nonatomic) UIWindow *window;
  
  @end
  
  NS_ASSUME_NONNULL_END
  