From 96480b5ba9bb56d8412021176e439b9b02c9d2c7 Mon Sep 17 00:00:00 2001
From: Klaus Meinhardt <klaus.meinhardt1@gmail.com>
Date: Mon, 22 Oct 2018 20:59:42 +0200
Subject: [PATCH] fix return type of LangageServiceHost.resolve*

Fixes: #28058
---
 src/services/types.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/services/types.ts b/src/services/types.ts
index 80dac58095c..72ded445dba 100644
--- a/src/services/types.ts
+++ b/src/services/types.ts
@@ -212,9 +212,9 @@ namespace ts {
          *
          * If this is implemented, `getResolvedModuleWithFailedLookupLocationsFromCache` should be too.
          */
-        resolveModuleNames?(moduleNames: string[], containingFile: string, reusedNames?: string[], redirectedReference?: ResolvedProjectReference): ResolvedModule[];
+        resolveModuleNames?(moduleNames: string[], containingFile: string, reusedNames?: string[], redirectedReference?: ResolvedProjectReference): (ResolvedModule | undefined)[];
         getResolvedModuleWithFailedLookupLocationsFromCache?(modulename: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined;
-        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string, redirectedReference?: ResolvedProjectReference): ResolvedTypeReferenceDirective[];
+        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string, redirectedReference?: ResolvedProjectReference): (ResolvedTypeReferenceDirective | undefined)[];
         /* @internal */ hasInvalidatedResolution?: HasInvalidatedResolution;
         /* @internal */ hasChangedAutomaticTypeDirectiveNames?: boolean;