message: Changing arguments to object to support oneOf - this will allow parameterization
diff: }
  },
  "arguments": {
  - "description": "User specified arguments to HDInsightActivity.",
  - "type": "array",
  - "items": {
  "type": "object",
  - "description": "Type: string (or Expression with resultType string)."
  - }
  + "description": "User specified arguments to HDInsightActivity. Type: array (or Expression with resultType array)."
  },
  "getDebugInfo": {
  "$ref": "#/definitions/HDInsightActivityDebugInfoOption",
  