KtErrorCallInfo:
  candidateCalls = [
    KtSimpleFunctionCall:
      isImplicitInvoke = false
      partiallyAppliedSymbol = KtPartiallyAppliedSymbol:
        dispatchReceiver = KtExplicitReceiverValue:
          expression = a
          isSafeNavigation = false
        extensionReceiver = null
        signature = KtFunctionLikeSignature:
          receiverType = null
          returnType = kotlin.Unit
          symbol = /A.foo(<dispatch receiver>: A): kotlin.Unit
          valueParameters = []
      argumentMapping = {}
  ]
  diagnostic = ERROR<INVISIBLE_REFERENCE: Symbol private final fun foo(): R|kotlin/Unit| is invisible>
