Set filter in Langchain Self-Query Retriever I use the Self-Query Retriever from langchain lib and want to set the filter to "in", because my attribute is string of keywords (comma-separated). I create a retriever: from langchain.retrievers.self_query.base import SelfQueryRetriever SQretriever = SelfQueryRetriever.from_llm( llm, vectorstore, document_content_description, metadata_field_info, verbose = True, k=5, ) And then I want to get the documents: SQretriever.get_relevant_documents("What color has the...