json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema",
      "title": "This document describes the structure of engine version output",
      "description": "Engine version output is an array of objects describing the state of the engines",
      "type": "array",
      "items": {
          "$ref": "#/definitions/result"
      },
      "definitions": {
          "result": {
              "type": "object",
              "description": "Represents install/version request result",
              "properties": {
                  "installed": {
                      "type": "boolean",
                      "description": "Installation status"
                  },
                  "message": {
                      "type": "string",
                      "description": "Error message if cant install engine"
                  },
                  "name": {
                      "type": "string",
                      "description": "Engine name"
                  },
                  "version": {
                      "type": "string",
                      "description": "Engine version"
                  },
                  "packages": {
                      "type": "array",
                      "description": "List of dependencies",
                      "items": {
                          "$ref": "#/definitions/result"
                      }
                  }
              },
              "required": [
                  "name",
                  "installed"
              ]
          }
      }
  }