extensions/markdown-language-features/src/languageFeatures/documentSymbolProvider.ts/MdDocumentSymbolProvider/provideDocumentSymbolInformation
class MdDocumentSymbolProvider:	public async provideDocumentSymbolInformation(document: SkinnyTextDocument): Promise<vscode.SymbolInformation[]> {
		const toc = await TableOfContents.create(this.engine, document);
		return toc.entries.map(entry => this.toSymbolInformation(entry));
	}