code: def is_file(self, paths):
      results = []
      for path in paths:
          full_path = self.full_uri(path)
          results.append(os.path.isfile(full_path))
      return results
  
file_path: metaflow/metaflow/plugins/datastores/local_storage.py
imports: import json
  import os
  from metaflow.metaflow_config import DATASTORE_LOCAL_DIR, DATASTORE_SYSROOT_LOCAL
  from metaflow.datastore.datastore_storage import CloseAfterUse, DataStoreStorage
label_desc: Use image node_id 3 for calling the LocalStorage obj's underlying member method code with example usage: obj.is_file(paths) and returns: results