code: private static Family findFamily(final Child child) {
          if (!child.isSet()) {
              return new Family();
          }
          final Family foundFamily = (Family) child.find(child.getFromString());
          if (foundFamily == null) {
              return new Family();
          }
          return foundFamily;
      }
docs: Get the family for this child to build the navigator with.
  
  @param child the child
  @return the family