Building

A building of a town, as TownInstance:getBuildings reports it.

getJsonKey

Returns the json key of this building, such as core:fort.

• returns string — Identifier of this building, scoped by the mod providing it.

getBuildingType

Returns the predefined building type shared across towns.

• returns string? — 'fort', 'villageHall', ...; nil for buildings without a predefined type.

isUpgrade

Whether this building is an upgrade of another, as a citadel is of a fort.

• returns boolean — True when this building improves another one instead of standing on its own.