extensions/markdown-language-features/src/languageFeatures/references.ts/MdVsCodeReferencesProvider/provideReferences
class MdVsCodeReferencesProvider:	async provideReferences(document: ITextDocument, position: vscode.Position, context: vscode.ReferenceContext, token: vscode.CancellationToken): Promise<vscode.Location[]> {
		const allRefs = await this.referencesProvider.getReferencesAtPosition(document, position, token);
		return allRefs
			.filter(ref => context.includeDeclaration || !ref.isDefinition)
			.map(ref => ref.location);
	}