My favorite example is the asana loader[0] for llama-index. It's literally just the most basic wrapper around the Asana SDK to concatenate some strings.

[0] - https://github.com/emptycrown/llama-hub/blob/main/llama_hub/...

Yea that's langchain in a nutshell. Their postgres wrapper was the same last time I used it was pretty much

```

  def queryPostgres(client, string)
    return client.query(string)

```