KtOperationReferenceExpression(58,65): 'infixOp'
  KaApplicableCallCandidate:
    candidate = KaSimpleFunctionCall:
      contextArgumentMapping = {}
      contextArguments = []
      dispatchReceiver = null
      extensionReceiver = KaExplicitReceiverValue:
        expression = 4
        isSafeNavigation = false
        type = kotlin.Int
      signature = KaFunctionSignature:
        receiverType = kotlin.Int
        returnType = kotlin.Unit
        symbol = /infixOp(<extension receiver>: kotlin.Int, rhs: kotlin.String): kotlin.Unit
        valueParameters = [
          KaVariableSignature:
            name = rhs
            receiverType = null
            returnType = kotlin.String
            symbol = rhs: kotlin.String
            contextParameters = []
            callableId = null
        ]
        contextParameters = []
        callableId = /infixOp
      typeArgumentsMapping = {}
      valueArgumentMapping = {
        "str" -> (KaVariableSignature:
          name = rhs
          receiverType = null
          returnType = kotlin.String
          symbol = rhs: kotlin.String
          contextParameters = []
          callableId = null)
      }
    isInBestCandidates = true