private String getValueOutput() {
		if (referenceId != null) {
			String refId = toExternalId(referenceId);
			if (modifier != null) {
				return refId + modifier.getSerializationString();
			}
			return refId;
		}
		return fontToString(value);
	}
Constructor used when the FontValue will inherit its {@link Font} from another FontValue. The
font value field will be null.
@param id the id for this FontValue
@param refId the id of another FontValue that this FontValue will inherit from
Ghidra/Framework/Gui/src/main/java/generic/theme/FontValue.java