Creates a Feature Group that adds its child layers into a parent group when added to a map (e.g. through L.Control.Layers)
Retrieve all Leaflet Default Icon options from CSS, in particular all icon images URL's, to improve compatibility with bundlers and frameworks that modify URL's in CSS.
Sub-plugin for Leaflet.markercluster plugin; brings compatibility with Layers Control and other plugins
Replaces missing Tiles by scaled lower zoom Tiles
Adds ability to freeze clusters at specified zoom