an [entity tag][gfile-etag] for the current GFile, or NULL to ignore
TRUE if a backup should be created
a set of GFileCreateFlags
the [I/O priority][io-priority] of the request
optional gio.Cancellable object, NULL to ignore
a GAsyncReadyCallback to call when the request is satisfied
the data to pass to callback function
Asynchronously overwrites the file, replacing the contents, possibly creating a backup copy of the file first.
For more details, see g_file_replace() which is the synchronous version of this call.
When the operation is finished, callback will be called. You can then call g_file_replace_finish() to get the result of the operation.