# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function
## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place
Related PR https://github.com/twentyhq/twenty/pull/9941
* feat: set field as custom object label identifier in Object Detail
Closes#3302
* feat: prevent disabling Object label identitifer field in back-end
* refactor: review - extract isLabelIdentifier variable
* feat: display identifier field in Object Detail page for custom objects
Closes#3301
* fix: show Name as object label identifier by default
* Minor improvements
---------
Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>
* fix: display label identifier field input in Show Page
Fixes#3003
* Cleaned a bit after comments
---------
Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>
