text: //
  //  FABAttributes.h
  //  Fabric
  //
  //  Created by Priyanka Joshi on 3/3/15.
  //  Copyright (c) 2015 Twitter. All rights reserved.
  //
  
  #pragma once
  
  #define FAB_UNAVAILABLE(x) __attribute__((unavailable(x)))
  
  #if __has_feature(nullability)
  #define FAB_NONNULL __nonnull
  #define FAB_NULLABLE __nullable
  #define FAB_START_NONNULL _Pragma("clang assume_nonnull begin")
  #define FAB_END_NONNULL _Pragma("clang assume_nonnull end")
  #else
  #define FAB_NONNULL
  #define FAB_NULLABLE
  #define FAB_START_NONNULL
  #define FAB_END_NONNULL
  #endif
  