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