From 678584eb4420cc9dcdcdbfc41eb8d5e7dcc86b5f Mon Sep 17 00:00:00 2001
From: Jason <574469551@qq.com>
Date: Fri, 24 Jun 2022 16:05:36 +0800
Subject: [PATCH] Improve type infererence for Map

---
 type-definitions/immutable.d.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/type-definitions/immutable.d.ts b/type-definitions/immutable.d.ts
index 5dcee7987..4a77d9044 100644
--- a/type-definitions/immutable.d.ts
+++ b/type-definitions/immutable.d.ts
@@ -759,7 +759,9 @@ declare namespace Immutable {
    * but since Immutable Map keys can be of any type the argument to `get()` is
    * not altered.
    */
-  function Map<V>(obj: V): Map<keyof V, V[keyof V]>;
+  function Map<V>(obj: V): (V extends Map<unknown, unknown>
+    ? V
+    : Map<keyof V, V[keyof V]>);
 
   interface Map<K, V> extends Collection.Keyed<K, V> {
     /**