code: public Theme theme(String name, Project project, Map<String, Object> attributes) {
          Theme theme = new Theme(instance);
  
          theme.setName(name);
          theme.setProject(project);
          addAttributes(theme, attributes);
          theme.save();
          return theme;
      }
docs: Create a new Theme with a name.
  
  @param name       The initial name of the entity.
  @param project    The Project this Theme will be in.
  @param attributes additional attributes for the Theme.
  @return A newly minted Theme that exists in the VersionOne system.