fn inserted_row(
values: &BTreeMap<String, WriteValue>,
identity: Option<&str>,
step: usize,
ensured_unique_key: Option<&[String]>,
) -> InsertedRowfn inserted_row(
values: &BTreeMap<String, WriteValue>,
identity: Option<&str>,
step: usize,
ensured_unique_key: Option<&[String]>,
) -> InsertedRow