public ThriftCallServiceBuilder addService(String key, Object service) {
        requireNonNull(key, "key");
        requireNonNull(service, "service");
        servicesBuilder.put(key, service);
        return this;
    }
Adds a service with a key for {@link ThriftServiceEntry}.
thrift/thrift0.13/src/main/java/com/linecorp/armeria/server/thrift/ThriftCallServiceBuilder.java