gOutputStreamSplice(object, source, flags = "G_OUTPUT_STREAM_SPLICE_NONE", cancellable = NULL, .errwarn = TRUE)objectsourceGInputStream.flagsGOutputStreamSpliceFlags.cancellableGCancellable object, NULL to ignore.integer containing the size of the data spliced, or
-1 if an error occurred.errorGError location to store the error occuring, or NULL to
ignore.