docs: public Object unmarshal(InputStream in)
              throws IOException {
          try {
              Unmarshaller unmarshaller = m_ctx.createUnmarshaller();
              configureJaxbUnmarshaller(unmarshaller);
              return unmarshaller.unmarshal(new StreamSource(in), m_clzRoot).getValue();
          }
          catch (JAXBException e) {
              throw new IOException(e);
          }
      }