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: JSCClassVariadicFunction, 
    user_data: gpointer, 
    destroy_notify: GDestroyNotify, 
    return_type: GType
)