public static LayerMask AddToMask(this LayerMask original, params string[] layerNames)
 {
     return(original | LayerMaskExtensions.NamesToMask(layerNames));
 }
        public static LayerMask RemoveFromMask(this LayerMask original, params string[] layerNames)
        {
            LayerMask mask = ~original;

            return(~(mask | LayerMaskExtensions.NamesToMask(layerNames)));
        }
 public static LayerMask Create(params string[] layerNames)
 {
     return(LayerMaskExtensions.NamesToMask(layerNames));
 }