Why not use dot notation?
myObject.isPaused = YES;
return myObject.isPaused;
If your property is declared as @property BOOL isPaused, then the installer is always called as
[myObject setIsPaused:YES]
To rename a setter, you must provide a full signature, including colons:
@property(setter=setPaused:) BOOL isPaused;
...
[myObject setPaused:YES];
BTW, the naming convention does not include verbs in a property.
@property(getter=isPaused) BOOL paused;