code: def _get_file_size(path, get_retriever):
      
      integration, config = get_retriever.integration_and_config(path)
      if integration:
          return integration.file_size(path, config)
      elif os.path.exists(path):
          return os.path.getsize(path) / (1024.0 * 1024.0)
docs: Return file size in megabytes, including querying remote integrations