pub trait MetaComponentPropsBuilder: Sized + AsMut<AnyJsStaticProps> + HtmlCommonSharedPropsBuilder<HtmlMetaElement> {
    fn char_set(self, v: Option<&str>) -> Self { ... }
    fn content(self, v: Option<&str>) -> Self { ... }
    fn http_equiv(self, v: Option<&str>) -> Self { ... }
    fn name(self, v: Option<&str>) -> Self { ... }
    fn media(self, v: Option<&str>) -> Self { ... }
}