code: def create(self, vector_dim: int):
      import faiss
  
      self._index = faiss.IndexIDMap2(
          faiss.IndexHNSWFlat(vector_dim, 32)
      )
  
file_path: evadb/evadb/third_party/vector_stores/faiss.py
imports: import os
  from pathlib import Path
  from typing import List
  import numpy
  from evadb.third_party.vector_stores.types import FeaturePayload, VectorIndexQuery, VectorIndexQueryResult, VectorStore
  from evadb.utils.generic_utils import try_to_import_faiss
label_desc: Use image node_id 2 for calling the FaissVectorStore obj's underlying member method code with example usage: obj.create(vector_dim) without return types