apollo-client/src/main/java/com/ctrip/framework/apollo/internals/LocalFileConfigRepository.java/LocalFileConfigRepository/setLocalCacheDir
class LocalFileConfigRepository:  void setLocalCacheDir(File baseDir, boolean syncImmediately) {
    m_baseDir = baseDir;
    this.checkLocalConfigCacheDir(m_baseDir);
    if (syncImmediately) {
      this.trySync();
    }
  }