@Override
		public void actionPerformed(ActionEvent arg0) {
			searchDirection = Direction.BACKWARD;

			if (dialog.getMessagePanel() != null) {
				dialog.getMessagePanel().clear();
			}
		}
Invoked when the user clicks the radio button indicating that subsequent searches should
progress in the BACKWARD direction.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/instructionsearch/ui/SearchDirectionWidget.java