public EditFaceReference(Face face, Action<Document, Face> action)
{
ParentID = face.Parent.ID;
ID = face.ID;
Before = face.Clone();
After = null;
Action = action;
}
public EditFaceReference(long id, Face before, Face after)
{
ParentID = before.Parent.ID;
ID = id;
Before = before.Clone();
After = after.Clone();
Action = null;
}