private void setMarshallerProperties(Marshaller marshaller) throws PropertyException {
    for (Entry<String, Object> en : properties.entrySet()) {
      marshaller.setProperty(en.getKey(), en.getValue());
    }
  }
Creates a new {@link jakarta.xml.bind.Marshaller} that handles the supplied class.
jaxb-jakarta/src/main/java/feign/jaxb/JAXBContextFactory.java