protonj2-client/src/main/java/org/apache/qpid/protonj2/client/transport/netty4/Netty4IOContext.java [112:123]:
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    public void shutdown() {
        if (!group.isShutdown()) {
            group.shutdownGracefully(0, SHUTDOWN_TIMEOUT, TimeUnit.MILLISECONDS);
            try {
                if (!group.awaitTermination(2 * SHUTDOWN_TIMEOUT, TimeUnit.MILLISECONDS)) {
                    LOG.trace("Connection IO Event Loop shutdown failed to complete in allotted time");
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
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protonj2-client/src/main/java/org/apache/qpid/protonj2/client/transport/netty5/Netty5IOContext.java [114:125]:
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    public void shutdown() {
        if (!group.isShutdown()) {
            group.shutdownGracefully(0, SHUTDOWN_TIMEOUT, TimeUnit.MILLISECONDS);
            try {
                if (!group.awaitTermination(2 * SHUTDOWN_TIMEOUT, TimeUnit.MILLISECONDS)) {
                    LOG.trace("Connection IO Event Loop shutdown failed to complete in allotted time");
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
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