KtNameReferenceExpression(50,52): 'aa'
  KaCallResolutionSuccess:
    call = KaSimpleVariableAccessCall:
      contextArguments = []
      dispatchReceiver = KaExplicitReceiverValue:
        expression = a
        isSafeNavigation = true
        type = A
      extensionReceiver = null
      isContextSensitive = false
      kind = Read
      signature = KaVariableSignature:
        name = aa
        receiverType = null
        returnType = A?
        symbol = val aa: A?
        contextParameters = []
        callableId = /A.aa
      typeArgumentsMapping = {}
