# There are two shards which define same name module and same method signature, how to use both shards? **URL:** \ **Category:** Help & Support\ **Created:** [June 18, 2022, 4:51pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698 "2022-06-18T16:51:52Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![zw963](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/zw963/32/1623_2.png) [@zw963](https://forum.crystal-lang.org/u/zw963)\ **Post date:** [June 18, 2022, 4:51pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698/1 "2022-06-18T16:51:52Z")
We do a assume: We hare two shards, both define Base58 module, one of the define #encode, #decode, another one define #encode only So, how to use both shards in my project? how to differentiate them? is there a way like go import, add a alias for avoid conflict? Thank you. ---
**Author:** ![bcardiff](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/bcardiff/32/3_2.png) [@bcardiff](https://forum.crystal-lang.org/u/bcardiff)\ **Post date:** [June 18, 2022, 4:58pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698/2 "2022-06-18T16:58:55Z")
There is no way to include both shards and distinguish them. Namespace are global. ---
**Author:** ![zw963](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/zw963/32/1623_2.png) [@zw963](https://forum.crystal-lang.org/u/zw963)\ **Post date:** [June 18, 2022, 5:06pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698/3 "2022-06-18T17:06:52Z")
If two shard use same module name, later defined can open the earlier defined, right? this is a common issue from ruby, it’s seem like still exists on crystal. 😄 ---
**Author:** ![bcardiff](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/bcardiff/32/3_2.png) [@bcardiff](https://forum.crystal-lang.org/u/bcardiff)\ **Post date:** [June 18, 2022, 5:57pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698/4 "2022-06-18T17:57:16Z")
Yes. Modules and classes can be reopened. I think is an consequence of wanting global namespace and allowing monkey-patching. That means that as a final user you could load shard A, alias method to re-expose it with a different name, then load shard B. But that if shard A is used as intermediate dependency this will nos dependants of A to keep using A. They will use B. But as an end user you can do that. ---
**Author:** ![zw963](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/zw963/32/1623_2.png) [@zw963](https://forum.crystal-lang.org/u/zw963)\ **Post date:** [June 18, 2022, 7:29pm UTC](https://forum.crystal-lang.org/t/there-are-two-shards-which-define-same-name-module-and-same-method-signature-how-to-use-both-shards/4698/5 "2022-06-18T19:29:24Z")
Yes, in fact, i hope get the same power in dart, because some flutter package do wrong setting hard-code in package, i want to change it, but there is no way to do that, you never ever open and fix the class defined in package. I don’t know how crystal get this, this make crystal wonderful ! BTW: following is some discuss about monkey patch of dart, since 2018, still not add it. > > > What is the possibility that this could end up in the Dart engine. This is one …feature that I find I really miss compared to JavaScript. > > If someone industrious could add this feature; would it be accepted; or is it pretty hard to get new language level features added because of being under a language standard?