shutdown abstract method

void shutdown(SocketDirection direction)

Shutdown the socket in the direction. Calling shutdown will never throw an exception and calling it several times is supported. Calling shutdown with either SocketDirection.BOTH or SocketDirection.RECEIVE can result in a RawSocketEvent.READ_CLOSED event.

Source

void shutdown(SocketDirection direction);

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https://api.dartlang.org/stable/1.24.3/dart-io/RawSocket/shutdown.html