json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "JSON schema for multi type testing",
      "description": "This is a multi type test schema :)",
      "definitions": {
          "action": {
              "type": "object",
              "properties": {
                  "default_title": {
                      "description": "Tooltip for the main toolbar icon.",
                      "type": "string"
                  },
                  "default_popup": {
                      "description": "The popup appears when the user clicks the icon.",
                      "$ref": "#/definitions/icon"
                  },
                  "default_icon": {
                      "description": "Icon for the main toolbar.",
                      "type": "object",
                      "properties": {
                          "19": {
                              "$ref": "#/definitions/icon"
                          },
                          "38": {
                              "$ref": "#/definitions/icon"
                          }
                      }
                  }
              }
          },
          "icon": {
              "type": "object",
              "properties": {
                  "description": {
                      "type": "string"
                  },
                  "suggested_key": {
                      "type": "object",
                      "patternProperties": {
                          "^(default|mac|windows|linux|chromeos)$": {
                              "type": "string",
                              "pattern": "^(Ctrl|Command|MacCtrl|Alt|Option)\\+(Shift\\+)?[A-Z]"
                          }
                      },
                      "additionalProperties": false
                  }
              }
          },
          "command": {
              "type": "object",
              "properties": {
                  "description": {
                      "type": "string"
                  },
                  "suggested_key": {
                      "type": "object",
                      "patternProperties": {
                          "^(default|mac|windows|linux|chromeos)$": {
                              "type": "string",
                              "pattern": "^(Ctrl|Command|MacCtrl|Alt|Option)\\+(Shift\\+)?[A-Z]"
                          }
                      },
                      "additionalProperties": false
                  }
              }
          }
      },
      "type": "object",
      "properties": {
          "model_version": {
              "description": "version of the current model",
              "type": "number",
              "enum": [
                  1
              ],
              "maximum": 1,
              "minimum": 1
          },
          "default_locale": {
              "description": "Specifies the subdirectory of _locales that contains the default strings for this extension.",
              "type": "string",
              "default": "en"
          }
      }
  }