is it possible to prepopulate a slug field from more than one field, e.g. from firstName + lastName

[stefanprobst]

with a content collection like this, is is possible to pre-populate the slug field from both firstName and lastName?

import { config, collection, fields } from '@keystatic/core';

export default config({
  storage: { kind: 'local', },
  collections: {
    persons: collection({
      label: 'Persons',
      // How to achieve `${lastName}-${firstName}`?
      slugField: 'lastName',
      path: './content/persons/*',
      format: 'json',
      schema: {
        firstName: fields.text({ label: 'First name' }),
        lastName: fields.slug({ name: { label: 'Last name' } }),
      }
    }),
  },
});

[florian-lefebvre]

I think it's discussed in #340 so yeah, not available already