docs: private void handleOutboundMimeMessageHeader(final org.springframework.ws.soap.SoapMessage message,
                                                   final String name,
                                                   final Object value,
                                                   final boolean handleMimeHeaders) {
          if (!handleMimeHeaders) {
              return;
          }
  
          if (message instanceof SaajSoapMessage) {
              final SaajSoapMessage soapMsg = (SaajSoapMessage) message;
              final MimeHeaders headers = soapMsg.getSaajMessage().getMimeHeaders();
              headers.setHeader(name, value.toString());
          } else if (message instanceof AxiomSoapMessage) {
              log.warn("Unable to set mime message header '" + name + "' on AxiomSoapMessage - unsupported");
          } else {
              log.warn("Unsupported SOAP message implementation - unable to set mime message header '" + name + "'");
          }
      }