protected ListingField getField(Address a, String fieldName) {

		ListingPanel panel = codeBrowser.getListingPanel();
		BigInteger index = panel.getAddressIndexMap().getIndex(a);
		FieldPanel fieldPanel = panel.getFieldPanel();
		ListingField field = getField(fieldName, 1, index, fieldPanel);
		return field;
	}
Returns a field by the given name at the given address.   Clients can use the convention
that field factory classes specify a public static field named 'FIELD_NAME' to choose the
desired field name.
<p>
Note: you will have to perform a {@code goTo()} to trigger the view to load the given field.

@param a the address
@param fieldName the field name
@return the field
Ghidra/Features/Base/src/main/java/ghidra/test/AbstractProgramBasedTest.java