mch-outsight

I also encountered this issue while bumping tsoa from 5.1.1 to 6.0.0, I confirm that I lost the `nullable` attribute while using `Partial` alias in TypeScript: ``` export default interface...

I don't think there is such an equivalent from FontAwesome, but it could be a mix between their [clone](https://fontawesome.com/icons/clone?f=classic&s=regular) icon and their [file-circle-plus](https://fontawesome.com/icons/file-circle-plus?f=classic&s=regular) icon (i.e. it's just adding a "+"...

Hi! As a PrimeIcons user, it would be great to have more generic "expand" and "collapse" icons as @byjokese mentioned above. These icons would help in having an "expand all...