message: Fix Synapse: Add SheetIndex in Datasets
diff: },
  "sheetName": {
  "type": "object",
  - "description": "The sheet of excel file. Type: string (or Expression with resultType string)."
  + "description": "The sheet name of excel file. Type: string (or Expression with resultType string)."
  + },
  + "sheetIndex": {
  + "type": "object",
  + "description": "The sheet index of excel file and default value is 0. Type: integer (or Expression with resultType integer)"
  },
  "range": {
  "type": "object",
  }
  },
  "required": [
  - "location",
  - "sheetName"
  + "location"
  ]
  },
  "ParquetDataset": {
  