private boolean isHorizontalOrRotated( int tabPlacement ) {
		return isHorizontalTabPlacement( tabPlacement ) == (getRealTabRotation( tabPlacement ) == NONE);
	}
Returns {@code true} if tab placement is top/bottom and text is painted horizontally or
if tab placement is left/right and text is painted vertically (rotated).
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTabbedPaneUI.java