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