@exportSymbol ol.source.BingMaps
@exportSymbol ol.BingMapsStyle
@exportProperty ol.BingMapsStyle.AERIAL
@exportProperty ol.BingMapsStyle.AERIAL_WITH_LABELS
@exportProperty ol.BingMapsStyle.ROAD
@exportProperty ol.BingMapsStyle.ORDNANCE_SURVEY
@exportProperty ol.BingMapsStyle.COLLINS_BART