deserialize method
Deserializes the FML template elements, attributes and children
Implementation
@override
void deserialize(XmlElement xml) {
// deserialize
super.deserialize(xml);
// properties
url = Xml.get(node: xml, tag: 'url');
onconnected = Xml.get(node: xml, tag: 'onconnected');
ondisconnected = Xml.get(node: xml, tag: 'ondisconnected');
onerror = Xml.get(node: xml, tag: 'onerror');
onmessage = Xml.get(node: xml, tag: 'onmessage');
}