File.replaceReadwriteAsync

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

Asynchronously overwrites the file in read-write mode, replacing the contents, possibly creating a backup copy of the file first.

For more details, see [gio.file.File.replaceReadwrite] which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call [gio.file.File.replaceReadwriteFinish] 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][io-priority] of the request
`cancellable`	optional #GCancellable object, null to ignore
`callback`	a #GAsyncReadyCallback to call when the request is satisfied