code: @Override
  	public void doLabelAcqReport(Example<Instance> trainInst, int labelAcquired) {
  		this.acquisitionRateEstimator.add(labelAcquired);
  		this.acquiredInstances += labelAcquired;
  	}
docs: Receives the information if a label has been acquired and increases counters.
  
  @param trainInst the instance that was previously considered
  @param labelAcquired bool type which indicates if trainInst
  was acquired by the active learner