code: def promote_array_dtypes_(
      arrays, dtypes=None, increase_itemsize_factor=1
  ):
      if dtypes is None:
          dtypes = normalize_dtypes(arrays)
      elif not isinstance(dtypes, list):
          dtypes = [dtypes]
      dtype = get_minimal_dtype(
          dtypes, increase_itemsize_factor=increase_itemsize_factor
      )
      return change_dtypes_(arrays, dtype, clip=False, round=False)
  
imports: from __future__ import print_function, division, absolute_import
  import numpy
  import six.moves
  import imgaug
label_desc: Use image node_id 9 for calling a global function with example usage: promote_array_dtypes_(arrays, dtypes, increase_itemsize_factor) and returns: change_dtypes_