code: public boolean isCheckpointingEnabled() {
  
  		if (snapshotSettings == null) {
  			return false;
  		}
  
  		long checkpointInterval = snapshotSettings.getCheckpointCoordinatorConfiguration().getCheckpointInterval();
  		return checkpointInterval > 0 &&
  			checkpointInterval < Long.MAX_VALUE;
  	}
docs: Checks if the checkpointing was enabled for this job graph
  
  @return true if checkpointing enabled