| // FIR_IDENTICAL | |
| abstract class <!IMPLEMENTING_FUNCTION_INTERFACE!>A<!> : () -> Unit | |
| <!IMPLEMENTING_FUNCTION_INTERFACE!>object B<!> : (String, Int) -> Long { | |
| override fun invoke(a: String, B: Int) = 23L | |
| } | |
| abstract class <!IMPLEMENTING_FUNCTION_INTERFACE!>C<!> : kotlin.Function1<Any, Int> | |
| abstract class <!IMPLEMENTING_FUNCTION_INTERFACE!>D<!> : C() |