code: @Override
      public void writeTo(ODataEntity<?> t, Class<?> type, Type genericType,
              Annotation[] annotations, MediaType mediaType,
              MultivaluedMap<String, Object> httpHeaders,
              OutputStream entityStream) throws IOException {
          throw new UnsupportedOperationException();
      }
docs: /*
  (non-Javadoc)
  
  @see javax.ws.rs.ext.MessageBodyWriter#writeTo(java.lang.Object,
  java.lang.Class, java.lang.reflect.Type,
  java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType,
  javax.ws.rs.core.MultivaluedMap, java.io.OutputStream)