code: def persist(self):
      self._client.flush(self._collection_name)
  
file_path: evadb/evadb/third_party/vector_stores/milvus.py
imports: import os
  from typing import List
  from evadb.third_party.vector_stores.types import FeaturePayload, VectorIndexQuery, VectorIndexQueryResult, VectorStore
  from evadb.utils.generic_utils import try_to_import_milvus_client
label_desc: Use image node_id 4 for calling the MilvusVectorStore obj's underlying member method code with example usage: obj.persist() without return types