deserialize method
Deserializes the FML template elements, attributes and children
Implementation
@override
void deserialize(XmlElement xml) {
// deserialize
super.deserialize(xml);
// properties
major = Xml.get(node: xml, tag: 'major');
minor = Xml.get(node: xml, tag: 'minor');
distance = toInt(Xml.get(node: xml, tag: 'distance'));
}