code: def serialization(self):
      return "csv"
  
file_path: lore/tests/mocks/features.py
imports: import logging
  from lore.features.base import BaseFeatureExporter
  from lore.features.s3 import S3FeatureExporter
  import pandas
  import inflection
label_desc: Use image node_id 4 for calling the UserWarehouseSearchesFeature obj's underlying member method code with example usage: obj.serialization() and returns: str