pub unsafe extern "C" fn ditto_collection_insert_value(
ditto: &Ditto,
coll_name: Ref<'_>,
doc_cbor: Ref<'_, u8>,
doc_id: Option<Ref<'_, u8>>,
write_strategy: WriteStrategyRs,
txn: Option<&mut CWriteTransaction>
) -> Result_BoxedSlice<u8>