KtCallExpression(54,65): 'function(1)'
  KaApplicableCallCandidate:
    candidate = KaSimpleFunctionCall:
      contextArgumentMapping = {}
      contextArguments = []
      dispatchReceiver = null
      extensionReceiver = KaExplicitReceiverValue:
        expression = "str"
        isSafeNavigation = false
        type = kotlin.String
      signature = KaFunctionSignature:
        receiverType = kotlin.String
        returnType = kotlin.Unit
        symbol = /function(<extension receiver>: kotlin.String, a: kotlin.Int): kotlin.Unit
        valueParameters = [
          KaVariableSignature:
            name = a
            receiverType = null
            returnType = kotlin.Int
            symbol = a: kotlin.Int
            contextParameters = []
            callableId = null
        ]
        contextParameters = []
        callableId = /function
      typeArgumentsMapping = {}
      valueArgumentMapping = {
        1 -> (KaVariableSignature:
          name = a
          receiverType = null
          returnType = kotlin.Int
          symbol = a: kotlin.Int
          contextParameters = []
          callableId = null)
      }
    isInBestCandidates = true