UFile (package = ) [public final class InKt {...]
    UClass (name = InKt) [public final class InKt {...}]
        UMethod (name = foo) [public static final fun foo() : boolean {...}]
            UBlockExpression [{...}] : PsiType:Void
                [!] UnknownKotlinExpression (PROPERTY) [[!] UnknownKotlinExpression (PROPERTY)]
                [!] UnknownKotlinExpression (PROPERTY) [[!] UnknownKotlinExpression (PROPERTY)]
                UReturnExpression [return [!] UnknownKotlinExpression (BINARY_EXPRESSION)] : PsiType:Void
                    [!] UnknownKotlinExpression (BINARY_EXPRESSION) [[!] UnknownKotlinExpression (BINARY_EXPRESSION)]
