code: public void send(String uri, String data) {
          Objects.requireNonNull(uri, Required.URI.toString());
  
          final Set<ServerSentEventConnection> uriConnections = getConnections(uri);
          if (uriConnections != null) {
              uriConnections.stream()
                  .filter(ServerSentEventConnection::isOpen)
                  .forEach((ServerSentEventConnection connection) -> connection.send(data));
              
         }
      }
docs: Sends data to all connections for a given URI resource
  
  @param uri The URI resource for the connection
  @param data The event data