The receiver's delegate or nil if it doesn't have a delegate.
@property (nonatomic, weak) id<FBSDKSharingDelegate> delegate;
A Boolean value that indicates whether the receiver should fail if it finds an error with the share content.
@property (nonatomic, assign) BOOL shouldFailOnDataError;
If NO, the sharer will still be displayed without the data that was mis-configured. For example, an invalid placeID specified on the shareContent would produce a data error.
Validates the content on the receiver.
If an error occurs, upon return contains an NSError object that describes the problem.