code: def _filter_none(original: dict) -> dict:
      return {k: v for k, v in original.items() if v is not None}
  
imports: import io
  import json
  import os
  from typing import Union
  from lets_plot._global_settings import get_global_bool, has_global_value, FRAGMENTS_ENABLED
label_desc: Use image node_id 3 for calling a global function with example usage: _filter_none(original) and returns: unknown