docs: public void setSlotSharingGroup(SlotSharingGroup grp) {
  		if (this.slotSharingGroup != null) {
  			this.slotSharingGroup.removeVertexFromGroup(id);
  		}
  
  		this.slotSharingGroup = grp;
  		if (grp != null) {
  			grp.addVertexToGroup(id);
  		}
  	}