code: public List<Relationship> getNextRelationships() {
          final List<Relationship> nextRelationships = new LinkedList<Relationship>();
          for (final Relationship r : relationships) {
              if (r.getType() == RelationshipType.NEXT) {
                  nextRelationships.add(r);
              }
          }
          return nextRelationships;
      }
docs: Gets a list of next relationships for the Topic.