text: I recently visited the New York City Police Department days after the funerals of Officer Wilbert Mora and his partner, Officer Jason Rivera.         They were responding to a 9-1-1 call when a man shot and killed them with a stolen gun.         Officer Mora was 27 years old.         Officer Rivera was 22.         Both Dominican Americans whoâ€™d grown up on the same streets they later chose to patrol as police officers.         I spoke with their families and told them that we are forever in debt for their sacrifice, and we will carry on their mission to restore the trust and safety every community deserves.         Iâ€™ve worked on these issues a long time.         I know what works: Investing in crime preventionand community police officers whoâ€™ll walk the beat, whoâ€™ll know the neighborhood, and who can restore trust and safety.     Qdrant as a Retrieverâ€‹Qdrant, as all the other vector stores, is a LangChain Retriever, by using cosine similarity. retriever = qdrant.as_retriever()retriever    VectorStoreRetriever(vectorstore=<langchain.vectorstores.qdrant.Qdrant object at 0x7fc4e5720a00>, search_type='similarity', search_kwargs={})It might be also specified to use MMR as a search strategy, instead of similarity.retriever = qdrant.as_retriever(search_type="mmr")retriever    VectorStoreRetriever(vectorstore=<langchain.vectorstores.qdrant.Qdrant object at