code: def _is_not_none(value):
      """Check if a value is None."""
      return value is not None
  
file_path: geomstats/geomstats/vectorization.py
imports: import math
  import geomstats.backend
label_desc: Use image node_id 6 for calling a global function with example usage: _is_not_none(value) and returns: unknown