code: public Marshaller getMarshaller(String soapPackage) throws JAXBException
      {
          JAXBContextHolder jAXBContextHolder = this.get(soapPackage);
          if (jAXBContextHolder == null)
              return null;    // Never
          return jAXBContextHolder.getMarshaller();
      }
docs: Get the shared unmarshaller for this context.
  NOTE: Since this is shared, always synchronize on this object.
  @return