private JPanel buildContextRegisterFilterPanel() {
		buttonPanel = new JPanel(new FlowLayout());

		applyButton = new JButton(APPLY_BUTTON_TEXT);
		buttonPanel.add(applyButton);
		applyButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				ContextRegisterFilterInputDialog filterDialog =
					new ContextRegisterFilterInputDialog("Set Context Register Filter", extent,
						mainPanel);
				registerFilter = filterDialog.getFilter();
				if (registerFilter == null) {
					return;
				}
				applyFilterAction();
			}
		});

		clearButton = new JButton(CLEAR_BUTTON_TEXT);
		buttonPanel.add(clearButton);
		clearButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				clearFilterAction();
			}

		});
		return buttonPanel;
	}
Returns the context register filter
@return context register filter
Ghidra/Features/BytePatterns/src/main/java/ghidra/bitpatterns/gui/ContextRegisterFilterablePanelBuilder.java