public void setTabCloseToolTipText( String tabCloseToolTipText ) {
		putClientProperty( TABBED_PANE_TAB_CLOSE_TOOLTIPTEXT, tabCloseToolTipText );
	}
Specifies the tooltip text used for tab close buttons.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java