json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "alternateText": {
              "type": "string"
          },
          "default": {
              "type": "string"
          },
          "xl": {
              "type": "string"
          },
          "l": {
              "type": "string"
          },
          "m": {
              "type": "string"
          },
          "s": {
              "type": "string"
          },
          "options": {
              "type": "object",
              "properties": {
                  "default": {
                      "type": "string"
                  },
                  "xl": {
                      "type": "string"
                  },
                  "l": {
                      "type": "string"
                  },
                  "m": {
                      "type": "string"
                  },
                  "s": {
                      "type": "string"
                  }
              },
              "additionalProperties": false
          }
      },
      "definitions": {
          "options": {
              "type": "object",
              "properties": {
                  "default": {
                      "type": "string"
                  },
                  "xl": {
                      "type": "string"
                  },
                  "l": {
                      "type": "string"
                  },
                  "m": {
                      "type": "string"
                  },
                  "s": {
                      "type": "string"
                  }
              },
              "additionalProperties": false
          }
      },
      "required": [
          "alternateText",
          "default"
      ],
      "additionalProperties": false
  }