extensions/markdown-language-features/src/languageFeatures/references.ts/MdReferencesProvider/constructor
class MdReferencesProvider:	public constructor(
		private readonly linkProvider: MdLinkProvider,
		private readonly workspaceContents: MdWorkspaceContents,
		private readonly engine: MarkdownEngine,
		private readonly slugifier: Slugifier,
	) {
		super();

		this._linkCache = this._register(new MdWorkspaceCache(workspaceContents, doc => linkProvider.getAllLinks(doc)));
	}