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:
Processes power into your account, and spawns power creeps with special unique powers.
https://docs.screeps.com/api/#StructurePowerSpawn