A single entry in the author's visibility matrix: how one teaser field
is exposed to third-party investors.
display
Type: enum
required
Visibility mode for this field on the teaser. The full set of
allowed values for this field at this point in time is listed in
template.{field}.allowedDisplays. The read-only
unavailable sentinel surfaces here when the field has no
underlying value or has been plan-clamped away.