Method legacy

packages/client/lib/client/index.ts:1119–1123

* Create the "legacy" (v3/callback) interface

()

   * Create the "legacy" (v3/callback) interface
   */
  legacy(): RedisLegacyClientType {
    return new RedisLegacyClient(
      this as unknown as RedisClientType<M, F, S>
    ) as RedisLegacyClientType;
  }

  /**
   * Create {@link RedisClientPool `RedisClientPool`} using this client as a prototype