docs: private boolean updateSlot(SlotID slotId, AllocationID allocationId, JobID jobId) {
  		final TaskManagerSlot slot = slots.get(slotId);
  
  		if (slot != null) {
  			final TaskManagerRegistration taskManagerRegistration = taskManagerRegistrations.get(slot.getInstanceId());
  
  			if (taskManagerRegistration != null) {
  				updateSlotState(slot, taskManagerRegistration, allocationId, jobId);
  
  				return true;
  			} else {
  				throw new IllegalStateException("Trying to update a slot from a TaskManager " +
  					slot.getInstanceId() + " which has not been registered.");
  			}
  		} else {
  			LOG.debug("Trying to update unknown slot with slot id {}.", slotId);
  
  			return false;
  		}
  	}