code: public void triggerCheckpoint(long checkpointId, long timestamp, CheckpointOptions checkpointOptions) {
  		triggerCheckpointHelper(checkpointId, timestamp, checkpointOptions, false);
  	}
docs: Trigger a new checkpoint on the task of this execution.
  
  @param checkpointId of th checkpoint to trigger
  @param timestamp of the checkpoint to trigger
  @param checkpointOptions of the checkpoint to trigger