public void AddImportedChild(Activity importedChild, object origin)
{
ThrowIfDisposed();
ActivityUtilities.ValidateOrigin(origin, _activity);
if (importedChild != null)
{
_activity.AddImportedChild(importedChild);
if (importedChild.CacheId != _activity.CacheId)
{
importedChild.Origin = origin;
}
}
}