src/vs/workbench/contrib/externalUriOpener/common/externalUriOpenerService.ts/ExternalUriOpenerService/getConfiguredOpenerForUri
class ExternalUriOpenerService:	private getConfiguredOpenerForUri(openers: Map<string, IExternalUriOpener>, targetUri: URI): IExternalUriOpener | 'default' | undefined {
		const config = this.configurationService.getValue<ExternalUriOpenersConfiguration>(externalUriOpenersSettingId) || {};
		for (const [uriGlob, id] of Object.entries(config)) {
			if (testUrlMatchesGlob(targetUri.toString(), uriGlob)) {
				if (id === defaultExternalUriOpenerId) {
					return 'default';
				}

				const entry = openers.get(id);
				if (entry) {
					return entry;
				}
			}
		}
		return undefined;
	}