code: def test_qdrant_filter():
      client = QdrantClient(":memory:")
      create_qdrant_from_dir(
          dir_path="./website/docs",
          client=client,
          collection_name="autogen-docs",
      )
      results = query_qdrant(
          query_texts=[
              "How can I use AutoGen UserProxyAgent and AssistantAgent to do code generation?"
          ],
          n_results=4,
          client=client,
          collection_name="autogen-docs",
          # Return only documents with "AutoGen" in the string
          search_string="AutoGen",
      )
      assert len(results["ids"][0]) == 4
  
file_path: autogen/test/agentchat/contrib/test_qdrant_retrievechat.py
imports: import os
  import sys
  import pytest
  from autogen.agentchat.contrib.retrieve_assistant_agent import RetrieveAssistantAgent
  from autogen import config_list_from_json
  from conftest import skip_openai
  from test_assistant_agent import KEY_LOC, OAI_CONFIG_LIST
label_desc: Use image node_id 2 for calling a global function with example usage: test_qdrant_filter() without return types