public virtual OnPrincipalEndChangedNode VisitOnPrincipalEndChanged(OnPrincipalEndChangedNode node) => node;
 public override OnPrincipalEndChangedNode VisitOnPrincipalEndChanged(OnPrincipalEndChangedNode node)
 {
     Dispatcher._immediateConventionScope.OnForeignKeyPrincipalEndChanged(node.RelationshipBuilder);
     return(null);
 }