json_schema: {
      "definitions": {
          "counter": {
              "minimum": 0,
              "type": "integer"
          }
      },
      "properties": {
          "contents": {
              "$ref": "#/definitions/counter"
          },
          "directories": {
              "$ref": "#/definitions/counter"
          },
          "fake": {
              "type": "boolean"
          },
          "occurrences": {
              "$ref": "#/definitions/counter"
          },
          "releases": {
              "$ref": "#/definitions/counter"
          },
          "revisions": {
              "$ref": "#/definitions/counter"
          }
      },
      "type": "object"
  }