code: public static RelationType create(@NonNull String name) {
        RelationType toReturn = DynamicEnum.register(new RelationType(name));
        values.add(toReturn);
        return toReturn;
     }
docs: <p>Creates a new or retrieves an existing instance of RelationType with the given name.</p>
  
  @param name the name
  @return The instance of RelationType corresponding th the give name.