I see that `TextToCypherRetriever` has a

heh I kind of put that there as a future TODO

But the idea is, cypher_validator=validate_fn where validate_fn takes in a cypher query and returns a validated/corrected cypher query

I know neo4j had this cypher validation competition. They added the validator to langchain, been meaning to try and copy that to llama-index lol

well, I do also run langchain

I'm also seeing that, depending on the question, that the model I'm using will return an empty query entirely sometimes

oh interesting 🤔 Passing in this cyhpher_validator would be a good way to catch empty queries, and replace with some default query