src/vs/workbench/services/search/node/fileSearch.ts/AbsoluteAndRelativeParsedExpression/test
class AbsoluteAndRelativeParsedExpression:	test(_path: string, basename?: string, hasSibling?: (name: string) => boolean | Promise<boolean>): string | Promise<string | null> | undefined | null {
		return (this.relativeParsedExpr && this.relativeParsedExpr(_path, basename, hasSibling)) ||
			(this.absoluteParsedExpr && this.absoluteParsedExpr(path.join(this.root, _path), basename, hasSibling));
	}