deserialize method

Implementation

@override
void deserialize(XmlElement? xml) {
  if (xml == null) return;

  // deserialize
  super.deserialize(xml);

  latitude = Xml.get(node: xml, tag: 'latitude');
  longitude = Xml.get(node: xml, tag: 'longitude');

  // remove datasource listener. The parent map will take care of this.
  if ((datasource != null) &&
      (scope != null) &&
      (scope!.datasources.containsKey(datasource))) {
    scope!.datasources[datasource!]!.remove(this);
  }
}