From 9524853450d9a239d3d94b01ed28bb5931abe961 Mon Sep 17 00:00:00 2001
From: Orta <git@orta.io>
Date: Thu, 3 Jun 2021 13:37:09 +0100
Subject: [PATCH] Support for TypeScript 4.4

---
 src/languageFeatures.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/languageFeatures.ts b/src/languageFeatures.ts
index a2ae6104..74925c7d 100644
--- a/src/languageFeatures.ts
+++ b/src/languageFeatures.ts
@@ -333,9 +333,9 @@ export class DiagnosticsAdapter extends Adapter {
 	private _convertRelatedInformation(
 		model: editor.ITextModel,
 		relatedInformation?: DiagnosticRelatedInformation[]
-	): editor.IRelatedInformation[] | undefined {
+	): editor.IRelatedInformation[] {
 		if (!relatedInformation) {
-			return;
+			return [];
 		}
 
 		const result: editor.IRelatedInformation[] = [];