if (function.bodyBlockExpression != null) {
            // Given `fun f(...): R { blockExpression }`, `{ blockExpression }` is mapped to the enclosing anonymous function,
            // which may raise an exception if we attempt to retrieve, e.g., callable declaration from it.
            return null
        }
        if (function.typeReference == null) return null

- [`KT-58448`](https://youtrack.jetbrains.com/issue/KT-58448) K2 / IDE / SLC: `findAttributeValue` for attribute w/ default value raises ClassCastException

### IDE. Completion

#### Fixes

- [`KTIJ-26518`](https://youtrack.jetbrains.com/issue/KTIJ-26518) K2 IDE: Code completion does not insert import when completing a type in the vararg position