code: public static EmbeddedServer create(Object identifier,
                                          Routes routeMatcher,
                                          ExceptionMapper exceptionMapper,
                                          StaticFilesConfiguration staticFilesConfiguration,
                                          boolean multipleHandlers) {
  
          EmbeddedServerFactory factory = factories.get(identifier);
  
          if (factory != null) {
              return factory.create(routeMatcher, staticFilesConfiguration, exceptionMapper, multipleHandlers);
          } else {
              throw new RuntimeException("No embedded server matching the identifier");
          }
      }
docs: Creates an embedded server of type corresponding to the provided identifier.
  
  @param identifier               the identifier
  @param routeMatcher             the route matcher
  @param staticFilesConfiguration the static files configuration object
  @param multipleHandlers         true if other handlers exist
  @return the created EmbeddedServer object