code: public boolean reportSlotStatus(InstanceID instanceId, SlotReport slotReport) {
  		checkInit();
  
  		LOG.debug("Received slot report from instance {}: {}.", instanceId, slotReport);
  
  		TaskManagerRegistration taskManagerRegistration = taskManagerRegistrations.get(instanceId);
  
  		if (null != taskManagerRegistration) {
  
  			for (SlotStatus slotStatus : slotReport) {
  				updateSlot(slotStatus.getSlotID(), slotStatus.getAllocationID(), slotStatus.getJobID());
  			}
  
  			return true;
  		} else {
  			LOG.debug("Received slot report for unknown task manager with instance id {}. Ignoring this report.", instanceId);
  
  			return false;
  		}
  	}
docs: Reports the current slot allocations for a task manager identified by the given instance id.
  
  @param instanceId identifying the task manager for which to report the slot status
  @param slotReport containing the status for all of its slots
  @return true if the slot status has been updated successfully, otherwise false