public void setMapRunArn(String mapRunArn) {
        this.mapRunArn = mapRunArn;
    }
<p>
The Amazon Resource Name (ARN) of a Map Run. This field is returned only if <code>mapRunArn</code> was specified
in the <code>ListExecutions</code> API action. If <code>stateMachineArn</code> was specified in
<code>ListExecutions</code>, the <code>mapRunArn</code> isn't returned.
</p>

@param mapRunArn
       The Amazon Resource Name (ARN) of a Map Run. This field is returned only if <code>mapRunArn</code> was
       specified in the <code>ListExecutions</code> API action. If <code>stateMachineArn</code> was specified in
       <code>ListExecutions</code>, the <code>mapRunArn</code> isn't returned.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/ExecutionListItem.java