File.appendToAsync

void appendToAsync(gio.types.FileCreateFlags flags,  int  ioPriority,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

Asynchronously opens file for appending.

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

When the operation is finished, callback will be called. You can then call gio.file.File.appendToFinish to get the result of the operation.

Parameters

`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