Mixins do not work if the required API is not already imported

[pancaspe87]

Describe the bug When creating a story that imports CSS mixins from an external file, story is not created unless we also import css

To Reproduce Steps to reproduce the behavior:

1. Run project locally
2. Go to 'examples/stories/styled-string.tsx'
3. Remove csstext-transform: uppercase; from the import
4. Remove css from ArrayUse
5. Story doesn't work anymore

Expected behavior Story should be created

Screenshots