SearchContext.backwardAsync

void backwardAsync(gtk.text_iter.TextIter iter,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

The asynchronous version of [gtksource.search_context.SearchContext.backward].

See the [gio.async_result.AsyncResult] documentation to know how to use this function.

If the operation is cancelled, the callback will only be called if cancellable was not null. The method takes ownership of cancellable, so you can unref it after calling this function.

Parameters

`iter`	start of search.
`cancellable`	a #GCancellable, or null.
`callback`	a #GAsyncReadyCallback to call when the operation is finished.