private void reselectAction(ToggleDockingAction action) {
		// We must reselect the action and trigger the proper painting of its button.  We do this
		// by indirectly triggering property change events, which will not happen if we do not
		// change the state of the action.  So, the action is given to us in a selected state and
		// we must leave it in a selected state while trigger a property change, which is done
		// by toggling the state
		action.setSelected(false);
		action.setSelected(true);
	}
Tells a plugin that it is no longer needed.
The plugin should remove itself from anything that
it is registered to and release any resources.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/symtable/SymbolTablePlugin.java