langchain/vectorstores/sklearn.py/SKLearnVectorStore/similarity_search
class SKLearnVectorStore:    def similarity_search(
        self, query: str, k: int = 4, **kwargs: Any
    ) -> List[Document]:
        docs_scores = self.similarity_search_with_score(query, k=k, **kwargs)
        return [doc for doc, _ in docs_scores]