Function gtk4_sys::gtk_file_dialog_select_multiple_folders

pub unsafe extern "C" fn gtk_file_dialog_select_multiple_folders(
    self_: *mut GtkFileDialog,
    parent: *mut GtkWindow,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)

Available on crate feature v4_10 only.