# Belatuk Merge Map  [](https://dart.dev/null-safety) [](https://github.com/dart-backend/belatuk-common-utilities/blob/main/packages/merge_map/LICENSE) **Replacement of `package:merge_map` with breaking changes to support NNBD.** Combine multiple Maps into one. Equivalent to [Object.assign](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) in JS. ## Example ```dart import "package:platform_merge_map/platform_merge_map.dart"; void main() { Map map1 = {'hello': 'world'}; Map map2 = {'foo': {'bar': 'baz', 'this': 'will be overwritten'}}; Map map3 = {'foo': {'john': 'doe', 'this': 'overrides previous maps'}}; Map merged = mergeMap(map1, map2, map3); // {hello: world, foo: {bar: baz, john: doe, this: overrides previous maps}} } ```