final class TraitCollection

    extension TraitCollection : Equatable, Hashable, Sendable, SendableMetatype

`TraitCollection` is a collection of already-fetched trait data.
- `


  ### [contains(_:)](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Classes/TraitCollection#/s:13GoogleHomeSDK15TraitCollectionC8containsySbxmAA0D0RzlF)


  ` Whether the collection contains a `https://developers.home.google.com/reference/swift/GoogleHomeSDK/Protocols/Trait.html` of the specified type.

  #### Declaration

  Swift

      func contains<T>(_ type: T.Type) -> Bool where T : https://developers.home.google.com/reference/swift/GoogleHomeSDK/Protocols/Trait.html

- `


  ### [subscript(_:)](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Classes/TraitCollection#/s:13GoogleHomeSDK15TraitCollectionCyxSgxmcAA0D0Rzluip)


  ` Returns a Trait of the specified type, or nil if the Trait is not included in this
  `TraitGroup`\` or could not be parsed.

  #### Declaration

  Swift

      subscript<T>(type: T.Type) -> T? where T : https://developers.home.google.com/reference/swift/GoogleHomeSDK/Protocols/Trait.html, T : https://developers.home.google.com/reference/swift/GoogleHomeSDK/Protocols/Trait.html { get }

- `


  ### [==(_:_:)](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Classes/TraitCollection#/s:13GoogleHomeSDK15TraitCollectionC2eeoiySbAC_ACtFZ)


  ` Returns a Boolean value indicating whether two values are equal.

  Equality is the inverse of inequality. For any values `a` and `b`,
  `a == b` implies that `a != b` is `false`.

  #### Declaration

  Swift

      static func == (lhs: TraitCollection, rhs: TraitCollection) -> Bool

  #### Parameters

  |---|---|
  | ` lhs ` | A value to compare. |
  | ` rhs ` | Another value to compare. |

- `


  ### [hash(into:)](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Classes/TraitCollection#/s:13GoogleHomeSDK15TraitCollectionC4hash4intoys6HasherVz_tF)


  ` Hashes the essential components of this value by feeding them into the
  given hasher.

  Implement this method to conform to the `Hashable` protocol. The
  components used for hashing must be the same as the components compared
  in your type's `==` operator implementation. Call `hasher.combine(_:)`
  with each of these components.
  Important

  In your implementation of `hash(into:)`,
  don't call `finalize()` on the `hasher` instance provided,
  or replace it with a different instance.
  Doing so may become a compile-time error in the future.

  #### Declaration

  Swift

      func hash(into hasher: inout Hasher)