public ServerBuilder idleTimeoutMillis(long idleTimeoutMillis) {
        return idleTimeout(Duration.ofMillis(idleTimeoutMillis));
    }
Sets the idle timeout of a connection in milliseconds for keep-alive.

@param idleTimeoutMillis the timeout in milliseconds. {@code 0} disables the timeout.
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java