Implement getIcon() for Markers

[OsamaShabrez]

I am trying to optimize my application to avoid unnecessary redraws. I always get a collection of markers from my database and then I have to do a comparison to see if I need an update.

It would be cool if we can have a getIcon / getIconUrl / getCustomIconUrl function which will return the URL to the marker image which can be then used to identify if a marker needs to be redrawn.

For instance, in my application, I have a different icon for currently selected marker but it appears there is no way I can check what is the current icon and then only update a single marker rather than removing all markers and recreating them from scratch.

[IvanSanchez]

No need. Just read the value for myMarker.options.icon instead.

If you really need this, you're welcome to send a PR implementing a getIcon getter function which just returns this.options.icon.