The ui5-segmented-button shows a group of items. When the user clicks or taps
one of the items, it stays in a pressed state. It automatically resizes the items
to fit proportionally within the component. When no width is set, the component uses the available width.
Note: There can be just one selected item at a time.
selectedItem: ISegmentedButtonItem the pressed item. Deprecated: deprecated since 1.14.0 and will be removed in the next major release, use the selectedItems parameter instead. selectedItems: Array<ISegmentedButtonItem> an array of selected items. Since:1.14.0