How to unmarshall a SOAP Message response XML using JAXB

Issue

How to unmarshall a SOAP Message response XML using JAXB?

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "echoResponse", propOrder = {
    "_return"
})
public class EchoResponse {
    @XmlElement(name = "return")
    protected String _return;

    public String getReturn() {
        return _return;
    }
    public void setReturn(String value) {
        this._return = value;
    }
}

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    <soap:Body>
        <ns2:echoResponse xmlns:ns2="http://org.jboss.ws/jaxws/test">
            <return>Hello</return>
        </ns2:echoResponse>
    </soap:Body>
</soap:Envelope>