@Override
		public void closeComponent() {
			super.closeComponent();
			clearContents();
		}
Notifies the provider that the user pressed the "close" button.
The provider should take appropriate action.  Usually the
appropriate action is to hide the component or remove the
component.  If the provider does nothing in this method,
then the close button will appear broken.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/disassembler/DisassembledViewPlugin.java