@Override
	public FieldFactory newInstance(FieldFormatModel formatModel, ListingHighlightProvider provider,
			ToolOptions options, ToolOptions fieldOptions) {
		return new SpacerFieldFactory(formatModel, provider, options, fieldOptions);
	}
Returns the string to highlight
@param bf the ListingTextField
@param row the row in the field
@param col the column in the field
@param loc the programLocation.
Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/SpacerFieldFactory.java