Builder addService(ServerServiceDefinition service, @Nullable Class<?> type,
                           List<? extends Function<? super HttpService,
                                   ? extends HttpService>> additionalDecorators) {
            requireNonNull(service, "service");
            requireNonNull(additionalDecorators, "additionalDecorators");
            entries.add(new Entry(service.getServiceDescriptor().getName(), service, null, type,
                                  additionalDecorators));
            return this;
        }
A registry of the implementation methods bound to a {@link GrpcService}. Used for method dispatch and
documentation generation.
grpc/src/main/java/com/linecorp/armeria/server/grpc/HandlerRegistry.java