public static <R extends ConversationMessage> ConversationReply<R> noReply() {
        //noinspection unchecked
        return (ConversationReply<R>) NO_REPLY;
    }
Returns an object indicating that no reply should be sent.

@param <R> the reply type
@return a "no reply" marker
helper/src/main/java/me/lucko/helper/messaging/conversation/ConversationReply.java