src/vs/workbench/api/node/extHostTunnelService.ts/ExtHostTunnelService/$applyCandidateFilter
class ExtHostTunnelService:	async $applyCandidateFilter(candidates: CandidatePort[]): Promise<CandidatePort[]> {
		const filter = await Promise.all(candidates.map(candidate => this._showCandidatePort(candidate.host, candidate.port, candidate.detail ?? '')));
		const result = candidates.filter((candidate, index) => filter[index]);
		this.logService.trace(`ForwardedPorts: (ExtHostTunnelService) filtered from ${candidates.map(port => port.port).join(', ')} to ${result.map(port => port.port).join(', ')}`);
		return result;
	}