code: public DbModule getModule(final String moduleId) {
          final DbModule dbModule = repositoryHandler.getModule(moduleId);
  
          if (dbModule == null) {
              throw new WebApplicationException(Response.status(Response.Status.NOT_FOUND)
                      .entity("Module " + moduleId + " does not exist.").build());
          }
  
          return dbModule;
      }
docs: Returns a module
  
  @param moduleId String
  @return DbModule