Retina placemarker

Hello, it would be nice to implement the plugin having the possibility to upload a retina marker. Just putting a fixed size so that one can decide to upload a bigger image in pixel.
It seems like to be possible as described here:
https://stackoverflow.com/questions/23219410/custom-google-maps-marker-from-sprite-and-retina-proof
and here in google:
https://developers.google.com/maps/documentation/javascript/markers#complex_icons

thank you. Looking forward for it ??