extensions/typescript-language-features/src/languageFeatures/tsconfig.ts/TsconfigLinkProvider/isPathValue
class TsconfigLinkProvider:	private isPathValue(extendsNode: jsonc.Node | undefined): extendsNode is jsonc.Node {
		return extendsNode
			&& extendsNode.type === 'string'
			&& extendsNode.value
			&& !(extendsNode.value as string).includes('*'); // don't treat globs as links.
	}