public TabsPopupPolicy getTabsPopupPolicy() {
		return getClientPropertyEnumString( TABBED_PANE_TABS_POPUP_POLICY, TabsPopupPolicy.class,
			"TabbedPane.tabsPopupPolicy", TabsPopupPolicy.asNeeded );
	}
Returns the display policy for the "more tabs" button,
which shows a popup menu with the (partly) hidden tabs.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java