Method emit

source/python.js:22426–22432

(event, ...args)

    }

    emit(event, ...args) {
        if (this._events.has(event)) {
            for (const callback of this._events.get(event)) {
                callback(this, ...args);
            }
        }
    }

    register(name, value) {
        if (!this._registry.has(name)) {