gistfile1.txt

~~~~~~~~Objective C~~~~~~~~~~~~
// Make the receiver the active drawing appearance and perform the block.
// Saves and restores the previous current appearance.
- (void)performAsCurrentDrawingAppearance:(void (NS_NOESCAPE ^)(void))block API_AVAILABLE(macos(11.0));

~~~~~~~~C# Binding (outside of interface)~~~~~~~~~~~~
delegate void ChangeReceiver (null);

~~~~~~~~C# Binding (later, inside the interface)~~~~~~~~~~~~
[Mac (11,0)]
[Export ("performAsCurrentDrawingAppearance:")]
void PerformAsCurrentDrawingAppearance (ChangeReceiver receiver);