Inserts an overlay object into the list associated with the map.
- iOS 4.0+
- macOS 10.9+
- tvOS 9.0+
The overlay object to insert.
The index at which to insert the overlay object. If this value is greater than the number of objects in the
overlaysproperty, this method appends the object to the end of the array.
This method inserts the overlay into the