void setStyleColorFromTreeUI( Component c, Graphics2D g ) {
		setStyleColorFromTreeUI( c, g, ui -> ui.iconCollapsedColor );
	}
"collapsed" icon for {@link javax.swing.JTree}.

@uiDefault Component.arrowType				String	chevron (default) or triangle
@uiDefault Tree.icon.collapsedColor			Color

@author Karl Tauber
flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatTreeCollapsedIcon.java