extensions/markdown-language-features/src/languageFeatures/documentLinkProvider.ts/MdLinkProvider/getLinkDefinitions
class MdLinkProvider:	public async getLinkDefinitions(document: SkinnyTextDocument): Promise<Iterable<MdLinkDefinition>> {
		const codeInDocument = await findCode(document, this.engine);
		return this.getLinkDefinitions2(document, codeInDocument);
	}