message: Add capabilities for cognitive services.
diff: "description": "The internal identifier.",
  "readOnly": true
  },
  + "capabilities": {
  + "readOnly": true,
  + "type": "array",
  + "items": {
  + "$ref": "#/definitions/SkuCapability"
  + },
  + "description": "Gets the capabilities of the cognitive services account. Each item indicates the capability of a specific feature. The values are read-only and for reference only."
  + },
  "customSubDomainName": {
  "type": "string",
  "description": "Optional subdomain name used for token-based authentication."
  }
  }
  },
  + "SkuCapability": {
  + "properties": {
  + "name": {
  + "type": "string",
  + "description": "The name of the SkuCapability."
  + },
  + "value": {
  + "type": "string",
  + "description": "The value of the SkuCapability."
  + }
  + },
  + "description": "SkuCapability indicates the capability of a certain feature."
  + },
  "CheckDomainAvailabilityParameter": {
  "description": "Check Domain availability parameter.",
  "properties": {
  