How to get a reference value of another field within the 'hidden' property in Sanity.io.

 defineField({
  name: 'industry',
  title: 'Industry',
  type: 'reference',
  to: [{type: 'industries'}],
}),
defineField({
  name: 'industryCustom',
  title: 'Industry (Custom)',
  type: 'string',
  hidden: ({ parent }) => {
    // need to get value of `industry` field above.
    // `parent` only holds `_ref` but not actual value
  }
}),