# Storybook Core-Common Common utilities used across `@storybook/core-server` (manager UI configuration) and `@storybook/builder-webpack{4,5}` (preview configuration). This is a lot of code extracted for convenience, not because it made sense. Supporting multiple version of webpack and this duplicating a large portion of code that was never meant to be generic caused this. At some point we'll refactor this, it's likely a lot of this code is dead or barely used.