void isConnectable(SelectionKey k) {
    EventableSocketChannel ec = (EventableSocketChannel) k.attachment();
    long b = ec.getBinding();

    try {
      if (ec.finishConnecting()) eventCallback(b, EM_CONNECTION_COMPLETED, null);
      else UnboundConnections.add(b);
    } catch (IOException e) {
      UnboundConnections.add(b);
    }
  }