public MapRunItemCounts withRunning(Long running) {
        setRunning(running);
        return this;
    }
<p>
The total number of items being processed in child workflow executions that are currently in-progress.
</p>

@param running
       The total number of items being processed in child workflow executions that are currently in-progress.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/MapRunItemCounts.java