Missing FB symbols required by Parse SDK

FBMissingSymbols.m

NSString *FBTokenInformationExpirationDateKey = @"";
NSString *FBTokenInformationTokenKey = @"";
NSString *FBTokenInformationUserFBIDKey = @"";
@interface FBAppCall:NSObject
@end
@implementation FBAppCall
@end
@interface FBRequest:NSObject
@end
@implementation FBRequest
@end
@interface FBSession:NSObject
@end
@implementation FBSession
@end
@interface FBSessionTokenCaching:NSObject
@end
@implementation FBSessionTokenCaching
@end
@interface FBSessionTokenCachingStrategy:NSObject
@end
@implementation FBSessionTokenCachingStrategy
@end