Package org.eclipse.microprofile.rest.client.ext

@Version("1.2") @ProviderType package org.eclipse.microprofile.rest.client.ext
APIs for extending MP Rest Client functionality - such as new providers. Example: 
 @RegisterProvider(UnknownWidgetExceptionMapper.class)
 public interface MyClientService {
     @GET
     @Path("/myService/{id}")
     Widget getWidget(@PathParam("id") String id) throws UnknownWidgetException;
 }
 ...
 public class UnknownWidgetExceptionMapper implements ResponseExceptionMapper {

     @Override
     UnknownWidgetException toThrowable(Response response) {
         String msg = "Could not find widget with ID of " + response.getHeaderString("WidgetId");
         return new UnknownWidgetException(msg)
     }
 }