Protocol for working with UIView markers on the map.
func add(markerView: IMarkerView)
Add UIView marker.
markerView
IMarkerView
func add(markerViews: [IMarkerView])
markerViews
IMarkerView[]
func remove(markerView: IMarkerView)
Remove UIView marker.
func remove(markerViews: [IMarkerView])
func removeAll()
Delete all markers.