public String getStateMachineVersionArn() {
        return this.stateMachineVersionArn;
    }
<p>
The Amazon Resource Name (ARN) of the state machine version associated with the execution.
</p>
<p>
If the state machine execution was started with an unqualified ARN, it returns null.
</p>
<p>
If the execution was started using a <code>stateMachineAliasArn</code>, both the
<code>stateMachineAliasArn</code> and <code>stateMachineVersionArn</code> parameters contain the respective
values.
</p>

@return The Amazon Resource Name (ARN) of the state machine version associated with the execution.</p>
        <p>
        If the state machine execution was started with an unqualified ARN, it returns null.
        </p>
        <p>
        If the execution was started using a <code>stateMachineAliasArn</code>, both the
        <code>stateMachineAliasArn</code> and <code>stateMachineVersionArn</code> parameters contain the
        respective values.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/ExecutionListItem.java