code: function getIndexOptions() {
          return {
              fieldOptions: [
                  {fieldName: 'epubTitle', searchable: false, store: true},
                  {fieldName: 'spineItemPath', searchable: false, store: true},
                  {fieldName: 'href', searchable: false, store: true},
                  {fieldName: 'baseCfi', searchable: false, store: true},
                  {fieldName: 'id', searchable: false, store: true},
                  {fieldName: 'filename', searchable: true, store: true},
                  {fieldName: 'title', searchable: true, store: false},
                  {fieldName: 'body', searchable: true, store: false},
                  {fieldName: 'uuid', searchable: false, store: true}
              ]
          };
      }
docs: private