# EquipmentCollection A collection of equipment whose state can be inspected and modified. ``` struct EquipmentCollection ``` ## Topics ### Getting collection properties [`var count: Int`](/documentation/TabletopKit/EquipmentCollection/count) The number of equipment items in this collection. [`var ids: [EquipmentIdentifier]`](/documentation/TabletopKit/EquipmentCollection/ids) The identifiers of all the equipment in this collection. [`var state: EquipmentStateCollection`](/documentation/TabletopKit/EquipmentCollection/state) The collection of equipment states. ### Retrieving equipment identifiers [`func ids(childrenOf: EquipmentIdentifier) -> [EquipmentIdentifier]`](/documentation/TabletopKit/EquipmentCollection/ids(childrenOf:)) Returns the identifiers of all equipment that are children of the given equipment identifier. [`func ids(descendantsOf: EquipmentIdentifier) -> [EquipmentIdentifier]`](/documentation/TabletopKit/EquipmentCollection/ids(descendantsOf:)) Returns the identifiers of all equipment that are descendants of the given equipment identifier. [`func ids(of: (some Equipment).Type) -> [EquipmentIdentifier]`](/documentation/TabletopKit/EquipmentCollection/ids(of:)) Returns the identifiers of all equipment that conform to the given type. ### Changing the parent [`func reparent(id: EquipmentIdentifier, to: EquipmentIdentifier)`](/documentation/TabletopKit/EquipmentCollection/reparent(id:to:)) Change the parent of the equipment matching the given identifier. The given equipment becomes the last of the parent’s children. [`func reparent(ids: [EquipmentIdentifier], to: EquipmentIdentifier)`](/documentation/TabletopKit/EquipmentCollection/reparent(ids:to:)) Change the parent of the equipment matching the given identifiers. The reparented equipment is appended at the end of the parent’s children. ### Accessing the subscript [`subscript(of _: E.Type) -> [(identifier: EquipmentIdentifier, state: E.State)]`](/documentation/TabletopKit/EquipmentCollection/subscript(of:)) Returns the identifiers and corresponding states of all equipment that conform to the given type. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)