TryReadElementFromXml method
Implementation
@override
Future<bool> TryReadElementFromXml(EwsServiceXmlReader reader) async {
  if (await super.TryReadElementFromXml(reader)) {
    return true;
  } else {
    switch (reader.LocalName) {
      case XmlElementNames.NumberOfOccurrences:
        this.numberOfOccurrences = await reader.ReadElementValue<int>();
        return true;
      default:
        return false;
    }
  }
}