       summary: String,
        heading: String,
        category: Array,
        firstcategory: {
          type: String,
          computed: '_extractFirstCategory(category)',
        },
        difficulty: Number,
        duration: Number,
        tags: Array,
        label: {
          type: String,
          computed: '_extractLabelTag(tags)',
        },
        published: {
          type: String,
        },
        url: String,
        currenturl: String,
        generateBackParameter: {
          ty