protected List<ServiceInstance> discoverServers() {
        return this.client.getInstances(this.name);
    }
Discovers matching service instances. Can be overwritten to apply some custom filtering.

@return A list of service instances to use.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/nameresolver/DiscoveryClientNameResolver.java