/**
  * Fill repo_token for unsupported CI service.
  *
  * "COVERALLS_REPO_TOKEN" must be set.
  *
  * @return \Satooshi\Bundle\CoverallsV1Bundle\Collector\CiEnvVarsCollector
  */
 protected function fillRepoToken()
 {
     if ($this->config->hasRepoToken()) {
         $this->env['COVERALLS_REPO_TOKEN'] = $this->config->getRepoToken();
     }
     // backup
     if (isset($this->env['COVERALLS_REPO_TOKEN'])) {
         $this->readEnv['COVERALLS_REPO_TOKEN'] = $this->env['COVERALLS_REPO_TOKEN'];
     }
     return $this;
 }