get selectedItem() {
      return this._selectedItem;
    }
Currently selected item.

@readonly
@type {sap.ui.webc.main.ISegmentedButtonItem}
@name sap.ui.webc.main.SegmentedButton.prototype.selectedItem
@deprecated since 1.14.0. This method will be removed in the next major release.
Please use the <code>selectedItems</code> property instead.
@public