code: def _raise_cityscapes_error(msg):
      raise OSError(
          "\n\n"
          + msg
          + "\n\n"
          + "You must download the source files for the Cityscapes dataset "
          "manually."
          + "\n\n"
          + "Run `fiftyone zoo datasets info cityscapes` for more information"
      )
  
imports: import logging
  import os
  import eta.core.serial
  import eta.core.utils
  import fiftyone.core.dataset
  import fiftyone.core.fields
  import fiftyone.core.labels
  import fiftyone.core.media
  import fiftyone.core.sample
  import fiftyone.core.utils
  import fiftyone.utils.data
  import fiftyone.types
label_desc: Use image node_id 3 for calling a global function with example usage: _raise_cityscapes_error(msg) without return types