Generate an index file when using modular mode

I want to use Modular mode, but it doesn't generate an index file to mass-export stuff.
Rather than being able to do `import { Thing, ThingDto } from 'api';`, I'm forced to use multiple import statements, `import { Thing } from 'api/Thing'; import { ThingDto } from 'api/data-contracts';`

Is it possible to have this generate an `index.ts` file? If not a cli argument, then is it possible to have the modular templates generate a single extra file, such that each module can write to it once?

Thanks.