# 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
Fix#8968
Fix issue with drag and drop when record group are empty.
Happy to discuss the implementation, as it's limited to the
`@hello-pangea/dnd` api.
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Co-authored-by: Charles Bochet <charles@twenty.com>
