code: public Husband addHusbandToFamily(final Family family,
              final Person person) {
          if (family == null || person == null) {
              return new Husband();
          }
          final FamS famS = new FamS(person, "FAMS",
                  new ObjectId(family.getString()));
          final Husband husband = new Husband(family, "Husband",
                  new ObjectId(person.getString()));
          family.insert(husband);
          person.insert(famS);
          return husband;
      }
docs: Add a person as the husband in a family.
  @param family the family
  @param person the person
  
  @return the husband object