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node_modules/metro-config/src/__fixtures__/merged.metro.config.js.flow

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+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+/*::
+import type {ConfigT, InputConfigT} from '../types';
+
+type ConfigFn = (previous: ConfigT) => InputConfigT
+*/
+
+const {mergeConfig} = require('../loadConfig');
+
+const secondConfig /*:ConfigFn */ = previous => ({
+  resolver: {
+    sourceExts: ['before', ...previous.resolver.sourceExts],
+  },
+});
+
+const thirdConfig /*:ConfigFn */ = previous => ({
+  resolver: {
+    sourceExts: [...previous.resolver.sourceExts, 'after'],
+  },
+});
+
+module.exports = (metroDefaults /*:ConfigT*/): ConfigT =>
+  mergeConfig(metroDefaults, secondConfig, thirdConfig);