This doc shows how to include a file:

{{< include _content.qmd >}}

And this doc shows how to conditionally include based on a metadata file:

::: {.content-hidden unless-meta="path.to.metadata"}

This content will be hidden unless there exists a metadata entry like such:

```yml
path:
  to:
    metadata: true
```

:::

However, I want to include a section if a data frame has some rows in it, i.e. an R boolean expression.

Is that possible?