src/vs/platform/tunnel/node/sharedProcessTunnelService.ts/SharedProcessTunnelService/destroyTunnel
class SharedProcessTunnelService:	async destroyTunnel(id: string): Promise<void> {
		const tunnel = this._tunnels.get(id);
		if (tunnel) {
			this._logService.info(`[SharedProcessTunnelService] Disposing tunnel ${id}.`);
			this._tunnels.delete(id);
			await tunnel.dispose();
			return;
		}

		// Looks like this tunnel is still starting, mark the id as disposed
		this._disposedTunnels.add(id);
	}