I have:
Select multiple markers
Name:
selection-markers

Added selection-marker and select-marker. We don't really add -multiple overlays as it's too much detail.
Would selection-marker-multiple work where the selection was a multiple work?
You are right, selection include multiple so no need to use multiple.
Added select-multiple-marker and selection-multiple-marker.
Most helpful comment
Added
selection-markerandselect-marker. We don't really add-multipleoverlays as it's too much detail.