@exportSymbol ol.FeatureOverlay
@exportProperty ol.FeatureOverlay.prototype.addFeature
@exportProperty ol.FeatureOverlay.prototype.getFeatures
@exportProperty ol.FeatureOverlay.prototype.getStyle
@exportProperty ol.FeatureOverlay.prototype.getStyleFunction
@exportProperty ol.FeatureOverlay.prototype.removeFeature
@exportProperty ol.FeatureOverlay.prototype.setFeatures
@exportProperty ol.FeatureOverlay.prototype.setMap
@exportProperty ol.FeatureOverlay.prototype.setStyle