code: func (c *Option) Mixin(val js.M) *Option {
  	c.mixins = append(c.mixins, val)
  	return c
  }
docs: // The mixins option accepts an array of mixin objects.
  // These mixin objects can contain instance options just
  // like normal instance objects, and they will be
  // merged against the eventual options using the same
  // option merging logic in Vue.extend(). e.g.
  // If your mixin contains a created hook and
  // the component itself also has one, both functions will be called.
  //
  // Mixin hooks are called in the order they are provided,
  // and called before the component’s own hooks.