Method on

packages/sdk-recorder/src/index.ts:77–89

(
		event: K,
		handler: EventHandler<K>,
	)

	}

	on<K extends keyof RecorderEventMap>(
		event: K,
		handler: EventHandler<K>,
	): () => void {
		if (!this.listeners.has(event)) {
			this.listeners.set(event, new Set());
		}
		const set = this.listeners.get(event);
		if (set) set.add(handler as EventHandler<keyof RecorderEventMap>);
		return () => {
			this.listeners.get(event)?.delete(handler);
		};
	}

	private emit<K extends keyof RecorderEventMap>(
		event: K,