src/main/java/io/arivera/oss/embedded/rabbitmq/apache/commons/lang3/StopWatch.java
public void split() {
    if (this.runningState != State.RUNNING) {
      throw new IllegalStateException("Stopwatch is not running. ");
    }
    this.stopTime = System.nanoTime();
    this.splitState = SplitState.SPLIT;
  }
public void split() {
    if (this.runningState != State.RUNNING) {
      throw new IllegalStateException("Stopwatch is not running. ");
    }
    this.stopTime = System.nanoTime();
    this.splitState = SplitState.SPLIT;
  }
<p>
Split the time.
</p>

<p>
This method sets the stop time of the watch to allow a time to be extracted. The start time is unaffected,
enabling {@link #unsplit()} to continue the timing from the original start point.
</p>

@throws IllegalStateException
if the StopWatch is not running.