@Override
	public void copySetting(Settings settings, Settings destSettings) {
		Long l = settings.getLong(MUTABILITY);
		if (l == null) {
			destSettings.clearSetting(MUTABILITY);
		}
		else {
			destSettings.setLong(MUTABILITY, l);
		}
	}
Returns the mutability mode based on the current settings
@param settings the instance settings.
@return the current format value
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/MutabilitySettingsDefinition.java