Generating jax-ws classes of an endpoint with wsgen

An example jax-ws end point class:

package com.sample;

@WebService(serviceName = "sampleEndPoint")
public class SampleEndPoint {
    @WebMethod
    public boolean sampleWebMethod(@WebParam(name = "parameter") int parameter){
        return true;
    }
}

After the compilation of this class, we may want to generate request and response classes of this service. wsgen command is used for this purpose:

wsgen -keep -verbose -cp . com.sample.SampleEndPoint 

After the generation is done, we have two Java classes. One is for request and the other is for the response.
Request class is:

@XmlRootElement(name = "sampleWebMethod", namespace = "http://sample.com/")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "sampleWebMethod", namespace = "http://sample.com/")
public class Trigger {

    @XmlElement(name = "parameter", namespace = "")
    private int parameter;

    public int getParameter() {
        return this.parameter;
    }

    public void setParameter(int parameter) {
        this.parameter= parameter;
    }
}

and the response class is:

@XmlRootElement(name = "sampleWebMethodResponse", namespace = "http://sample.com/")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "sampleWebMethodResponse", namespace = "http://sample.com/")
public class SampleWebMethodResponse {

    @XmlElement(name = "return", namespace = "")
    private boolean _return;

    public boolean isReturn() {
        return this._return;
    }

    public void setReturn(boolean _return) {
        this._return = _return;
    }

}