protected override void ProcessTemplateItem(TemplateItem templateItem)
{
var innerItem = templateItem.InnerItem;
if (ShouldProcess(innerItem.GetProviderPath(), $"Add base template(s) '{TemplateItem.Select(t => t.InnerItem).GetProviderPaths()}'"))
{
MultilistField baseTemplateField = innerItem.Fields[Sitecore.FieldIDs.BaseTemplate];
innerItem.Editing.BeginEdit();
foreach (var template in TemplateItem)
{
// Check if base template already exists, if it does than there's nothing to do.
if (!baseTemplateField.Contains(template.ID.ToString()))
{
baseTemplateField.Add(template.ID.ToString());
}
}
innerItem.Editing.EndEdit();
}
}
