OptionaleffectsTemporary effects that are active on this object
OptionalnameCapacities should not be null, except on minerals in a lab when another mineral type is already being stored.
ID of the user who owns this object.
Note: NPCs do not have long-form hex ID strings like normal players:
Remotely attacks or heals creeps, or repairs structures. Can be targeted to any object in the room.
https://docs.screeps.com/api/#StructureTower