Signifies the composition request encountered an error.
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func finish(with error: Error)
Returns the error encountered during the compositing.
This method should be called by the custom compositor when the composition failed.
Signifies the composition request was canceled.
func finish(withComposedVideoFrame: CVPixelBuffer)
Signifies the composition request succeeded
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.