partial void DeleteCUSTOMER(CUSTOMER instance);
 partial void UpdateCUSTOMER(CUSTOMER instance);
 private void detach_CUSTOMERs(CUSTOMER entity)
 {
     this.SendPropertyChanging();
     entity.BANK = null;
 }
 partial void InsertCUSTOMER(CUSTOMER instance);
 private void attach_CUSTOMERs(CUSTOMER entity)
 {
     this.SendPropertyChanging();
     entity.BANK = this;
 }