# 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
Run yarn dev while server running on port 3000