System/Library/PrivateFrameworks/SpringBoard.framework

_SBMainScreenScreenshotProvider.h

Download _SBMainScreenScreenshotProvider.h

1. NSObject
2. >
3. _SBDefaultScreenshotProvider

@interface _SBMainScreenScreenshotProvider : _SBDefaultScreenshotProvider

- (id)captureScreenshot;
- (id)flasher;

@end