@Override
	public void copySetting(Settings settings, Settings destSettings) {
		Long l = settings.getLong(MNEMONIC);
		if (l == null) {
			destSettings.clearSetting(MNEMONIC);
		}
		else {
			destSettings.setLong(MNEMONIC, l);
		}
	}
Returns the format based on the specified settings
@param settings the instance settings.
@return the mnemonic style (DEFAULT, ASSEMBLY, CSPEC).  
The ASSEMBLY style is returned if no setting has been made.
The DEFAULT style corresponds to the use of {@link DataType#getName()}.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeMnemonicSettingsDefinition.java