public void setMinimumTabWidth( int minimumTabWidth ) {
		putClientProperty( TABBED_PANE_MINIMUM_TAB_WIDTH, (minimumTabWidth >= 0) ? minimumTabWidth : null );
	}
Specifies the minimum width of a tab.
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java