function onPopinChanged(oEvent) {
		const bHasPopin = oEvent.getParameter("hasPopin");
		const aHiddenInPopin = oEvent.getParameter("hiddenInPopin");
		const aVisibleItemsLength = oEvent.getSource().getVisibleItems().length;

		if (aVisibleItemsLength && (aHiddenInPopin.length || (bHasPopin && this.bShowDetails))) {
			this._oShowDetailsButton.setVisible(true);
		} else {
			this._oShowDetailsButton.setVisible(false);
		}
	}
Event handler called when the table pop-in has changed.

@param {sap.ui.base.Event} oEvent - Event object
@private