partial         void CopyExtraPropertiesToClone(StepResultAttachment clone, bool includeLocalProperties);
 public StepResultAttachment Clone(bool includeLocalProperties)
 {
     var c = new StepResultAttachment
             {
                 ContentType = ContentType,
                 CreatedAt = CreatedAt,
                 CreatedById = CreatedById,
                 FileName = FileName,
                 Id = Id,
                 Name = Name,
                 Size = Size,
                 SourceId = SourceId,
                 StepResultId = StepResultId,
             };
     CopyExtraPropertiesToClone(c, includeLocalProperties);
     return c;
 }