Function gtk4_sys::gtk_widget_class_add_binding

pub unsafe extern "C" fn gtk_widget_class_add_binding(
    widget_class: *mut GtkWidgetClass, 
    keyval: c_uint, 
    mods: GdkModifierType, 
    callback: GtkShortcutFunc, 
    format_string: *const c_char,
     ...
)