How to get the Filename of an Object of Type File to Preview it in a List View

const pdf: IObjectType = {
  name: 'pdf',
  title: 'PDF',
  type: 'file',
  description: 'Upload PDF files.',
  fields: [
    {
      name: 'title',
      title: 'Descriptive Name for PDF in Download Card',
      type: 'string',
      validation: (Rule: IRuleType): IRuleType => Rule.required(),
    },
  ],
  …,
  preview: {
    …
  }
}

select: {
  title: 'asset.originalFilename'
}