code: def _not_none(items):
      """Whether the item is a placeholder or contains a placeholder."""
      if not isinstance(items, (tuple, list)):
          items = (items,)
      return all(item is not _none for item in items)
  
imports: import json
  import pickle
  from skorch.utils import open_file_like
label_desc: Use image node_id 1 for calling a global function with example usage: _not_none(items) and returns: all