public void setDefaultIcon(Icon icon) {
		this.defaultIcon = icon;
	}
Sets the icon to use if the active action state does not supply an icon.

<p>
This is useful if you wish for your action states to not use icon, but desire the action
itself to have an icon.

@param icon the icon
Ghidra/Framework/Docking/src/main/java/docking/menu/MultiStateDockingAction.java