File.replaceAsync

void replaceAsync(string etag,  bool  makeBackup,  gio.types.FileCreateFlags flags,  int  ioPriority,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

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.

Parameters

`etag`	an entity tag for the current #GFile, or null to ignore
`makeBackup`	true if a backup should be created
`flags`	a set of #GFileCreateFlags
`ioPriority`	the I/O priority of the request
`cancellable`	optional #GCancellable object, null to ignore
`callback`	a #GAsyncReadyCallback to call when the request is satisfied