@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -229,6 +230,30 @@ void runInstanceTests() {
 fieldOverrides: [fieldOverride1, fieldOverride2],
 );
 });
+
+test('setIndexConfigurationFromJSON()', () async {
+final json = jsonEncode({
+'indexes': [
+{
+'collectionGroup': 'posts',
+'queryScope': 'COLLECTION',
+'fields': [
+{'fieldPath': 'author', 'arrayConfig': 'CONTAINS'},
+{'fieldPath': 'timestamp', 'order': 'DESCENDING'}
+]
+}
+],
+'fieldOverrides': [
+{
+'collectionGroup': 'posts',
+'fieldPath': 'myBigMapField',
+'indexes': []
+}
+]
+});
+
+await firestore.setIndexConfigurationFromJSON(json);
+});
 },
 );
 }

@@ -323,6 +323,20 @@ class FirebaseFirestore extends FirebasePluginPlatform {
 return _delegate.setIndexConfiguration(json);
 }
 
+/// Configures indexing for local query execution. Any previous index configuration is overridden.
+///
+/// The index entries themselves are created asynchronously. You can continue to use queries that
+/// require indexing even if the indices are not yet available. Query execution will automatically
+/// start using the index once the index entries have been written.
+/// See Firebase documentation to learn how to configure your index configuration JSON file:
+/// https://firebase.google.com/docs/reference/firestore/indexes
+///
+/// This API is in preview mode and is subject to change.
+ @experimental
+Future<void> setIndexConfigurationFromJSON(String json) async {
+return _delegate.setIndexConfiguration(json);
+}
+
 @override
 // ignore: avoid_equals_and_hash_code_on_mutable_classes
 bool operator ==(Object other) =>