docstr: Persist index to disk
docstr_tok: ["Persist","index","to","disk"]
code: def persist(self) -> None:
      """Persist index to disk"""
      return None
  
file_path: evadb/evadb/third_party/vector_stores/types.py
imports: from dataclasses import dataclass
  from typing import List
label_desc: Use image node_id 3 for calling the VectorStore obj's underlying member method code with example usage: obj.persist() and returns: None