code: def assert_nonempty_input(X: Any) -> None:
      """Ensures input is not None."""
      if X is None:
          raise ValueError(
              "Data features X cannot be None. Currently X is None."
          )
  
file_path: cleanlab/cleanlab/internal/validation.py
imports: from cleanlab.typing import LabelLike, DatasetLike
  from cleanlab.internal.constants import FLOATING_POINT_COMPARISON
  from typing import Any, List, Optional, Union
  import warnings
  import numpy
  import pandas
label_desc: Use image node_id 3 for calling a global function with example usage: assert_nonempty_input(X) without return types