public void setIcon(ComponentProvider provider, Icon icon) {
		ComponentPlaceholder placeholder = getActivePlaceholder(provider);
		placeholder.setIcon(icon);
		scheduleUpdate();
	}
Set whether a component's header should be shown; the header is the component that is dragged
in order to move the component within the tool, or out of the tool into a separate window.

@param provider provider of the visible component in the tool
@param b true means to show the header
Ghidra/Framework/Docking/src/main/java/docking/DockingWindowManager.java