/// <summary>
 /// Constructor for <see cref="BaseCampaignAudienceElement"/>.
 /// </summary>
 /// <param name="source">Instance of <see cref="BaseCampaignAudienceElement"/>.</param>
 /// <param name="dictToRebind">Dictionary to rebind schema elements' ids.</param>
 /// <param name="parentSchema">Parent campaign schema.</param>
 protected BaseCampaignAudienceElement(BaseCampaignAudienceElement source,
                                       Dictionary <Guid, Guid> dictToRebind, Core.Campaign.CampaignSchema parentSchema)
     : base(source, dictToRebind, parentSchema)
 {
     FolderId = source.FolderId;
 }
 /// <summary>
 /// Constructor for <see cref="BaseCampaignAudienceElement"/>.
 /// </summary>
 /// <param name="source">Instance of <see cref="BaseCampaignAudienceElement"/>.</param>
 protected BaseCampaignAudienceElement(BaseCampaignAudienceElement source)
     : this(source, null, null)
 {
 }