code: def is_nested(structure):
      return nest_util.is_nested(nest_util.Modality.DATA, structure)
  
file_path: tensorflow/tensorflow/python/data/util/nest.py
imports: from tensorflow.python.util import nest_util
label_desc: Use image node_id 1 for calling a global function with example usage: is_nested(structure) and returns: nest_util