private JButton getActionButton(String actionName) {
		Map<?, ?> actionMap = (Map<?, ?>) getInstanceField("toolbarButtonsByAction", dialog);
		Set<?> entrySet = actionMap.entrySet();
		for (Object entry : entrySet) {
			Map.Entry<?, ?> mapEntry = (Map.Entry<?, ?>) entry;
			DockingAction action = (DockingAction) mapEntry.getKey();
			if (actionName.equals(action.getName())) {
				return (JButton) mapEntry.getValue();
			}
		}
		return null;
	}
Tests that the offset fields in the AddressTableDialog are enabled
when they should be.
<p>
This class ensures that:
<ul>
    <li>the offset text field is enabled when there is a selection,
    <li>the auto label checkbox is enabled when there is a selection, and
    <li>the minimum offset is that of the lowest length of all the
        selected rows when there is a multiple selection.
</ul>

@since Tracker Id 488, 489, 490
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/disassembler/AutoTableDisassemblerTest.java