From d60c373cac817917660a6ec0064672557d3d1d6a Mon Sep 17 00:00:00 2001
From: Kenneth Geisshirt <kenneth.geisshirt@mongodb.com>
Date: Tue, 8 Jun 2021 15:25:54 +0200
Subject: [PATCH] Using  for mutual-exclusive TS def

---
 types/index.d.ts | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/types/index.d.ts b/types/index.d.ts
index d351fd3ad3..abf20d54da 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -107,7 +107,7 @@ declare namespace Realm {
         error?: ErrorCallback;
     }
 
-    interface ConfigurationWithSync {
+    interface BaseConfiguration {
         encryptionKey?: ArrayBuffer | ArrayBufferView | Int8Array;
         schema?: (ObjectClass | ObjectSchema)[];
         schemaVersion?: number;
@@ -115,19 +115,20 @@ declare namespace Realm {
         path?: string;
         fifoFilesFallbackPath?: string;
         readOnly?: boolean;
-        sync: SyncConfiguration;
     }
 
-    interface ConfigurationWithoutSync {
-        encryptionKey?: ArrayBuffer | ArrayBufferView | Int8Array;
+    interface ConfigurationWithSync extends BaseConfiguration {
+        sync: SyncConfiguration,
+        migration?: never,
+        inMemory?: never,
+        deleteRealmIfMigrationNeeded?: never,
+        disableFormatUpgrade?: never
+    }
+
+    interface ConfigurationWithoutSync extends BaseConfiguration {
+        sync?: never,
         migration?: MigrationCallback;
-        shouldCompactOnLaunch?: (totalBytes: number, usedBytes: number) => boolean;
-        path?: string;
-        fifoFilesFallbackPath?: string;
-        readOnly?: boolean;
         inMemory?: boolean;
-        schema?: (ObjectClass | ObjectSchema)[];
-        schemaVersion?: number;
         deleteRealmIfMigrationNeeded?: boolean;
         disableFormatUpgrade?: boolean;
     }
@@ -138,7 +139,6 @@ declare namespace Realm {
      */
     type Configuration = ConfigurationWithSync | ConfigurationWithoutSync;
 
-
     /**
      * realm configuration used for overriding default configuration values.
      * @see { @link https://realm.io/docs/javascript/latest/api/Realm.html#~Configuration }