docs: protected List<ExecutableScript> getEnvScripts(String scriptLanguage) {
      Map<String, List<ExecutableScript>> environment = getEnv(scriptLanguage);
      List<ExecutableScript> envScripts = environment.get(scriptLanguage);
      if(envScripts == null) {
        synchronized (this) {
          envScripts = environment.get(scriptLanguage);
          if(envScripts == null) {
            envScripts = initEnvForLanguage(scriptLanguage);
            environment.put(scriptLanguage, envScripts);
          }
        }
      }
      return envScripts;
    }