clients/src/main/java/org/apache/kafka/common/network/PlaintextTransportLayer.java [48:82]:
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    @Override
    public boolean finishConnect() throws IOException {
        boolean connected = socketChannel.finishConnect();
        if (connected)
            key.interestOps(key.interestOps() & ~SelectionKey.OP_CONNECT | SelectionKey.OP_READ);
        return connected;
    }

    @Override
    public void disconnect() {
        key.cancel();
    }

    @Override
    public SocketChannel socketChannel() {
        return socketChannel;
    }

    @Override
    public SelectionKey selectionKey() {
        return key;
    }

    @Override
    public boolean isOpen() {
        return socketChannel.isOpen();
    }

    @Override
    public boolean isConnected() {
        return socketChannel.isConnected();
    }

    @Override
    public void close() throws IOException {
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clients/src/main/java/org/apache/kafka/common/network/SslTransportLayer.java [135:175]:
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    @Override
    public boolean finishConnect() throws IOException {
        boolean connected = socketChannel.finishConnect();
        if (connected)
            key.interestOps(key.interestOps() & ~SelectionKey.OP_CONNECT | SelectionKey.OP_READ);
        return connected;
    }

    /**
     * disconnects selectionKey.
     */
    @Override
    public void disconnect() {
        key.cancel();
    }

    @Override
    public SocketChannel socketChannel() {
        return socketChannel;
    }

    @Override
    public SelectionKey selectionKey() {
        return key;
    }

    @Override
    public boolean isOpen() {
        return socketChannel.isOpen();
    }

    @Override
    public boolean isConnected() {
        return socketChannel.isConnected();
    }

    /**
    * Sends an SSL close message and closes socketChannel.
    */
    @Override
    public void close() throws IOException {
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