[BMRI] Streams ContractRatings

{
  "settings": {
    "enableTrace": "true"
  },
  "mappingRules": [
    {
      "name": "ExternalCreditRatingToContractRatings",
      "description": "ExternalCreditRatingToContractRatings",
      "condition": null,
      "sequence": 1,
      "mappings": [
        {
          "toProperty": "ContractId",
          "transformations": [
            {
              "type": "ContractId",
              "parameters": [
                {
                  "type": "Trim",
                  "parameter": {
                    "type": "Map",
                    "fromProperty": "ReportingDate"
                  }
                },
                {
                  "type": "Trim",
                  "parameter": {
                    "type": "Map",
                    "fromProperty": "OriginCounterpartyId"
                  }
                },
                {
                  "type": "Trim",
                  "parameter": {
                    "type": "Map",
                    "fromProperty": "OriginContractId"
                  }
                }
              ]
            }
          ]
        },
        {
          "toProperty": "RatingAgencyCode",
          "transformations": [
            {
              "type": "Map",
              "fromProperty": "ExternalCreditRatingAgency"
            }
          ]
        },
        {
          "toProperty": "RatingScaleCode",
          "transformations": [
            {
              "type": "Map",
              "fromProperty": "ExternalCreditRatingScale"
            }
          ]
        },
        {
          "toProperty": "RatingCode",
          "transformations": [
            {
              "type": "Map",
              "fromProperty": "ExternalCreditRating"
            }
          ]
        }
      ]
    }
  ]
}