typeAheadSelect() {
      const typeAheadOption = this.filteredOptions[this.typeAheadPointer]

      if (typeAheadOption && this.selectable(typeAheadOption)) {
        this.select(typeAheadOption)
      }
    }
Select the option at the current typeAheadPointer position.
Optionally clear the search input on selection.
@return {void}