I have a function that does this:

fn my_fn(...) -> Result<MySerdeType> {
    ...
    if let Some(table) = doc.remove("toplevel-key") {
        Ok(toml_edit::de::from_item(table)?)
    } else {
        ...
    }
}

With the new toml_edit that removed from_item, how do I do this? I see from the changelog that I'm supposed to use toml_edit::de::ValueDeserializer somehow but I couldn't figure out how to wire things up...