XML : How to remove prefix and namespace in SOAPElement?

Collogues, i have cycle which create soap xml with nessesary structure (don't ask about the structure)

  log.info("Body elements: ");                          NodeList nodeList = body.getElementsByTagName("*") ;                          for (int i = 0; i < nodeList.getLength(); i++) {                              Node node = nodeList.item(i);                              if (node.getNodeType() == Node.ELEMENT_NODE) {                                    log.info(node.getNodeName());                                    if (node.getNodeName().equals("ns2:request") ) {                                      log.info("Set namespace and prefix for " + node.getNodeName());                                      SOAPElement childX = (SOAPElement) node;                                      childX.removeNamespaceDeclaration(childX.getPrefix()) ;                                      childX.addNamespaceDeclaration("ns3", "http://mayacomp/Generic/Ws");                                      childX.setPrefix("ns3");                                    }                                    else {                                        if (node.getNodeName().equals("ns2:in") ) {                                          log.info("Remove namespace for  " + node.getNodeName());                                          SOAPElement childX = (SOAPElement) node;                                          childX.removeNamespaceDeclaration(childX.getPrefix()) ;                                          childX.addNamespaceDeclaration("", "");                                          childX.setPrefix("");                                        }                                    SOAPElement childX = (SOAPElement) node;                                  childX.removeNamespaceDeclaration(childX.getPrefix()) ;                                  childX.setPrefix("");                                  }                              }                          }    

As a result I receive xml:

  <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">     <soapenv:Body>        <ns3:request xmlns:ns3="http://mayacomp/Generic/Ws">           <in xmlns="http://mayacomp/Generic/Ws">              <requestHeader>    

My question is how to remove only xmlns="http://mayacomp/Generic/Ws" from <in> element and receive:

     <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">         <soapenv:Body>            <ns3:request xmlns:ns3="http://mayacomp/Generic/Ws">               <in>                  <requestHeader>