struct InvalidReference

    extension InvalidReference : Equatable, Sendable, SendableMetatype

The "reference," which refers to output produced by a preceding node, is unknown.
- `


  ### [reference](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Structs/InvalidReference#/s:13GoogleHomeSDK16InvalidReferenceV9referenceSSvp)


  ` The "reference," which refers to output produced by a preceding node.

  #### Declaration

  Swift

      let reference: String

- `


  ### [expression](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Structs/InvalidReference#/s:13GoogleHomeSDK16InvalidReferenceV10expressionAA22IdentifiableExpression_pSgvp)


  ` The associated expression. Set null if the expression is not found.

  #### Declaration

  Swift

      let expression: (any https://developers.home.google.com/reference/swift/GoogleHomeSDK/Protocols/IdentifiableExpression.html)?

- `


  ### [==(_:_:)](https://developers.home.google.com/reference/swift/GoogleHomeSDK/Structs/InvalidReference#/s:13GoogleHomeSDK16InvalidReferenceV2eeoiySbAC_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: InvalidReference, rhs: InvalidReference) -> Bool

  #### Parameters

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