code: def estimate_normalization_type(inputs):
      nonempty, success, parents = find_first_nonempty(inputs)
      type_str = _nonempty_info_to_type_str(nonempty, success, parents)
      return type_str
  
imports: from __future__ import print_function, division, absolute_import
  import functools
  import numpy
  from ..None import imgaug
  from ..None import dtypes
  from .base import IAugmentable
label_desc: Use image node_id 31 for calling a global function with example usage: estimate_normalization_type(inputs) and returns: type_str