ticalAlign: {
            type: String,
            value: 'top',
            reflectToAttribute: true
          },

          /**
           * If true, the `horizontalAlign` and `verticalAlign` properties will
           * be considered preferences instead of strict requirements when
           * positioning the dropdown and may be changed if doing so reduces
           * the area of the dropdown falling outside of `fitInto`.
           */
          dynamicAlign: {
            type: Boolean
          },

 