public void setTabsPopupPolicy( TabsPopupPolicy tabsPopupPolicy ) {
		putClientPropertyEnumString( TABBED_PANE_TABS_POPUP_POLICY, tabsPopupPolicy );
	}
Specifies 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