KtDotQualifiedExpression(59,66): 'a.foo()'
  KaCallResolutionError:
    candidateCalls = [
      KaSimpleFunctionCall:
        contextArgumentMapping = {}
        contextArguments = []
        dispatchReceiver = KaExplicitReceiverValue:
          expression = a
          isSafeNavigation = false
          type = A
        extensionReceiver = null
        signature = KaFunctionSignature:
          receiverType = null
          returnType = kotlin.Unit
          symbol = /A.foo(<dispatch receiver>: A): kotlin.Unit
          valueParameters = []
          contextParameters = []
          callableId = /A.foo
        typeArgumentsMapping = {}
        valueArgumentMapping = {}
    ]
    diagnostic = ERROR<INVISIBLE_REFERENCE: Cannot access 'fun foo(): Unit': it is private in 'A'.>
