apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ReleaseService.java/ReleaseService/rollbackTo
class ReleaseService:  public void rollbackTo(Env env, long releaseId, long toReleaseId, String operator) {
    releaseAPI.rollbackTo(env, releaseId, toReleaseId, operator);
  }