Prepares the image to receive drawing commands using the specified flipped state.
Original signature is '- (void)lockFocusFlipped:(BOOL)flipped'
Available in Mac OS X v10.6 and later.


- flipped (Boolean)
- YES if the drawing context should be flipped, otherwise NO.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later)