public ClientFactoryBuilder http2GracefulShutdownTimeout(Duration duration) {
        requireNonNull(duration, "duration");
        return http2GracefulShutdownTimeoutMillis(duration.toMillis());
    }
Sets the graceful connection shutdown timeout in milliseconds.
{@code 0} disables the timeout and closes the connection immediately after sending a GOAWAY frame.
core/src/main/java/com/linecorp/armeria/client/ClientFactoryBuilder.java