code: public void close(String uri) {
          Objects.requireNonNull(uri, Required.URI.toString());
  
          final Set<ServerSentEventConnection> uriConnections = getConnections(uri);
          if (uriConnections != null) {
              uriConnections.forEach((ServerSentEventConnection connection) -> {
                  if (connection.isOpen()){
                      MangooUtils.closeQuietly(connection);
                  }
             });
             removeConnections(uri);
          }
      }
docs: Closes all connections for a given URI resource
  
  @param uri The URI resource for the connection