src/vs/workbench/contrib/preferences/browser/preferencesSearch.ts/RemoteSearchProvider/getVersionFilters
class RemoteSearchProvider:	private getVersionFilters(exts: ILocalExtension[], buildNumber?: number): string[] {
		// Only search extensions that contribute settings
		const filters = exts
			.filter(ext => ext.manifest.contributes && ext.manifest.contributes.configuration)
			.map(ext => this.getExtensionFilter(ext));

		if (buildNumber) {
			filters.push(`(packageid eq 'core' and startbuildno le '${buildNumber}' and endbuildno ge '${buildNumber}')`);
		}

		return filters;
	}