public InetSocketAddress socketAddress() {
    if (httpServer == null) {
      return EMPTY_SOCKET_ADDRESS;
    }
    return new InetSocketAddress(config.getHost(), httpServer.actualPort());
  }
Returns the socket address of the GraphQL HTTP service.

<p>This method returns the socket address that the HTTP server is bound to. If the server is
not running, it returns an empty socket address.

@return the socket address of the HTTP server, or an empty socket address if the server is not
    running.
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/graphql/GraphQLHttpService.java