KtFunctionalTypeVariableCall:
target = val x: kotlin.Function1<@R|kotlin.ParameterName|(name = String(a))  kotlin.Int, kotlin.Unit>
argumentMapping = { 1 -> (a: @R|kotlin.ParameterName|(name = String(a))  kotlin.Int) }
targetFunction = kotlin/Function1.invoke(<dispatch receiver>: kotlin.Function1<@R|kotlin.ParameterName|(name = String(a))  kotlin.Int, kotlin.Unit>, a: @R|kotlin.ParameterName|(name = String(a))  kotlin.Int): kotlin.Unit
substitutor = <empty substitutor>