The asynchronous version of gtk_source_search_context_backward().
See the documentation of gtk_source_search_context_backward() for more
details.
See the #GAsyncResult documentation to know how to use this function.
If the operation is cancelled, the @callback will only be called if
@cancellable was not %NULL. gtk_source_search_context_backward_async() takes
ownership of @cancellable, so you can unref it after calling this function.
The asynchronous version of gtk_source_search_context_backward().
See the documentation of gtk_source_search_context_backward() for more details.
See the #GAsyncResult documentation to know how to use this function.
If the operation is cancelled, the @callback will only be called if @cancellable was not %NULL. gtk_source_search_context_backward_async() takes ownership of @cancellable, so you can unref it after calling this function.