Zero-based index of the zone within the structure's flat zones array.
The zone's display label.
The zone's body parts, in order.
The zone's shortcode (its row key within the structure), for the Edit action.
The zone's run of zone numbers rendered for display, e.g. "4–8", or the
single number when the run is one long. Empty when the zone is unweighted
and so unrollable.
A body zone paired with its parts, the root of the Body Locations tree.