const WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index) const { CSSRule* rule = m_lstCSSRules.get()->item(index); return (rule && rule->isKeyframeRule()) ? static_cast<const WebKitCSSKeyframeRule*>(rule) : 0; }
WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index) { CSSRule* rule = m_lstCSSRules->item(index); ASSERT(rule->isKeyframeRule()); return static_cast<WebKitCSSKeyframeRule*>(rule); }