Method _flatten

packages/main/src/TabContainer.ts:893–903

(items: Array<ITab>)

	}

	_flatten(items: Array<ITab>) {
		const result: Array<ITab> = [];

		walk(items, item => {
			if (item.hasAttribute("ui5-tab") || item.hasAttribute("ui5-tab-separator")) {
				result.push(item);
			}
		});

		return result;
	}

	_onItemSelect(selectedTabId: string, originalEvent?: Event) {
		const selectedTabIndex = this._itemsFlat.findIndex(item => item.__id === selectedTabId);