CGImageSourceSetAllowableTypes(_:) Declarationfunc CGImageSourceSetAllowableTypes(_ allowableTypes: CFArray) -> OSStatus See AlsoFunctionsCGImageDestinationAddImageAndMetadata(_:_:_:_:)CGImageDestinationCopyImageSource(_:_:_:_:)CGImageSourceCopyMetadataAtIndex(_:_:_:)CGImageSourceRemoveCacheAtIndex(_:_:)