unsubscribe(subscriber, matcher) {
        const metas = this.getAttributeSubscribersMetas(matcher, {exact: true});
        if (metas.length > 1) {
            Logger.error("BUG! Found multiple attribute subscribers metas matching exactly. Please report this issue.", this.subscribers);
        }
        this.unsubscribeFromListedMetas(subscriber, metas);
    }
Remove previously added subscription for attribute changes matching the specified matcher.

@public
@param {import("./AttributeSubscriber")} subscriber
@param {AttributeMatcher|any} matcher