public static IEnumerable <IfcDoorPanelProperties> GetDoorPanelProperties(this IfcDoorStyle doorStyle)
 {
     return(doorStyle.HasPropertySets.OfType <IfcDoorPanelProperties>());
 }
 public static IfcDoorLiningProperties GetDoorLiningProperties(this IfcDoorStyle doorStyle)
 {
     return(doorStyle.HasPropertySets.OfType <IfcDoorLiningProperties>().FirstOrDefault());
 }