code: private <T> void renderSoapHeader(final Marshallable<T> marshallable, final Map<String, String> context, T xmlContext) {
  		try {
  			final Marshaller marshaller = jaxbContext.createMarshaller();
  			marshallable.marshal(marshaller, TpicMap.wrap(context), xmlContext);
  		} catch (JAXBException e) {
  			logger.warn("Unable to render TPIC header: {}", e.getMessage());
  			logger.debug("WithStack: Unable to render TPIC header: {}", e.getMessage(), e);
  		}
  	}
docs: Renders a given context map into a given result that should be the TPIC header node.