code: def exists(self) -> bool:
      return self._client.exists(self._file_path)
  
file_path: gokart/gokart/gcs_zip_client.py
imports: import os
  import shutil
  from gokart.gcs_config import GCSConfig
  from gokart.zip_client import ZipClient, _unzip_file
label_desc: Use image node_id 2 for calling the GCSZipClient obj's underlying member method code with example usage: obj.exists() and returns: self