I have one interface for REST service, for example:

@Produces(

{"application/json", "application/xml"})
@Consumes({"application/json", "application/xml"}

)
public interface SomeService {
List<SomeClass> getAnotherList();

@GET
@Path("/")
@Wrapped
List<SomeClass> getList();
}

And I'm trying to create proxy:
locationsService = ProxyFactory.create(SomeService.class, new URI(baseUrl), client, ResteasyProviderFactory.getInstance());

And I've got an exception:
java.lang.NullPointerException at org.jboss.resteasy.client.ProxyFactory.create(ProxyFactory.java:68)

Because method IsHttpMethod.getHttpMethods(method) can return null value in case when method in interface doesn't have GET or POST annotations.

Also as I see there is no way to create proxy for such interfaces.