public XmlNode AddMaximumDisplayAltitude(MaximumDisplayAltitudeType newValue)
 {
     if( newValue.IsNull() == false )
         return AppendDomChild(NodeType.Element, "", "MaximumDisplayAltitude", newValue.ToString());
     return null;
 }
 public void InsertMaximumDisplayAltitudeAt(MaximumDisplayAltitudeType newValue, int index)
 {
     if( newValue.IsNull() == false )
         InsertDomChildAt(NodeType.Element, "", "MaximumDisplayAltitude", index, newValue.ToString());
 }