an entity tag 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 #GCancellable object, null to ignore
a #GAsyncReadyCallback to call when the request is satisfied
Asynchronously overwrites the file, replacing the contents, possibly creating a backup copy of the file first.
For more details, see gio.file.File.replace which is the synchronous version of this call.
When the operation is finished, callback will be called. You can then call gio.file.File.replaceFinish to get the result of the operation.