public void setSessionArn(String sessionArn) {
        this.sessionArn = sessionArn;
    }
<p>
An ARN that uniquely identifies a <a>TestGridSession</a>.
</p>

@param sessionArn
       An ARN that uniquely identifies a <a>TestGridSession</a>.
aws-java-sdk-devicefarm/src/main/java/com/amazonaws/services/devicefarm/model/GetTestGridSessionRequest.java