class ColumnMappingUtils {

    public static ColumnMappings copy(ColumnMappings source)
    {
        ColumnMappings copy = new ColumnMappings();
        copy.getColumnMapping()
        .addAll(source.getColumnMapping().stream().map(ColumnMappingUtils::copy).collect(Collectors.toList()));
        return copy;
    }

    private  ColumnMappingUtils();

}