UnityEditor.AndroidXmlDocument.AppendElement C# (CSharp) Method

        protected XmlElement AppendElement(XmlElement node, string tag, string attribute)
        {
            if (node.SelectSingleNode(string.Format(".//{0}[@{1}]", tag, attribute), this.nsMgr) != null)
            {
                return null;
            }
            return (XmlElement) node.AppendChild(base.CreateElement(tag));
        }