Function javascriptcore_rs_sys::jsc_class_add_method_variadic

pub unsafe extern "C" fn jsc_class_add_method_variadic(
    jsc_class: *mut JSCClass,
    name: *const c_char,
    callback: GCallback,
    user_data: gpointer,
    destroy_notify: GDestroyNotify,
    return_type: GType
)