I have the following code:

private SOAPEnvelope toEnvelope(SOAPFactory factory, CreateCaseRequestBodyDocument param, boolean optimizeContent, QName elementQName) throws AxisFault {
    SOAPEnvelope envelope = factory.getDefaultEnvelope();
    if (param != null)
        envelope.getBody().addChild((OMNode)toOM(param, optimizeContent));
    return envelope;
}

public CaseResponseBodyDocument createCase(CreateCaseRequestBodyDocument body1) throws RemoteException {
    MessageContext _messageContext = new MessageContext();
    try {
        OperationClient _operationClient = this._serviceClient.createClient(this._operations[1].getName());
        _operationClient.getOptions().setAction("http://sample/CreateCaseRequest");
        _operationClient.getOptions().setExceptionToBeThrownOnSOAPFault(true);
        addPropertyToOperationClient(_operationClient, "whttp:queryParameterSeparator", "&");

        SOAPEnvelope env = toEnvelope(getFactory(_operationClient.getOptions().getSoapVersionURI()), body1, optimizeContent(new QName("http://sampleurl/", "createCase")), new QName("sampleurl/", "CreateCaseRequestBody"));
        
        this._serviceClient.addHeadersToEnvelope(env);
        _messageContext.setEnvelope(env);
        _operationClient.addMessageContext(_messageContext);
        _operationClient.execute(true);
        
        MessageContext _returnMessageContext = _operationClient.getMessageContext("In");
        SOAPEnvelope _returnEnv = _returnMessageContext.getEnvelope();
        Object object = fromOM(_returnEnv.getBody().getFirstElement(), CaseResponseBodyDocument.class);
        return (CaseResponseBodyDocument) object;
    } catch (AxisFault f) {
        // Handle the exception
    }
}

body1 has the following data:

<CreateCaseRequestBody xmlns="http://sampleurl.com/">
  <caseId xmlns="">402910</caseId>
  <caseXML xmlns="">
</CreateCaseRequestBody>

The _messageContext.setEnvelope(env) returns the following format:

<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
    <soapenv:Body>
        <ones:CreateCaseRequestBody xmlns:ones="http://sampleurl.com/">
            <caseXML><?xml version="1.0" encoding="UTF-8" standalone="yes"?>
            </caseXML>
        </ones:CreateCaseRequestBody>
    </soapenv:Body>
</soapenv:Envelope>

However, I want SOAP to return SOAP XML in the following format:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:ones="http://sampleurl.com/">
    <soapenv:Header/>
    <soapenv:Body>
        <ones:CreateCaseRequestBody>
            <caseXML>
            </caseXML>
        </ones:CreateCaseRequestBody>
    </soapenv:Body>
</soapenv:Envelope>

You can see this format does not include:

<?xml version='1.0' encoding='utf-8'?> 
and has the <soapenv:Header/> tag.

Please assist me with this, thank you so much!