@Override
  public int getSize() {
    return size;
  }
SizeableRunnable is a Runnable with a size. It implements the Sizeable interface for use in
QueuedExecutors using a ThrottlingMemLinkedBlockingQueue.
<p>

Instances/subclasses must provide the run() method to complete the Runnable interface.
<p>

@since GemFire 5.0
geode-core/src/main/java/org/apache/geode/distributed/internal/SizeableRunnable.java