code: def _convert_dtype_strs_to_types(dtypes):
      result = set()
      for name in dtypes.split(" "):
          name = name.strip()
          if name:
              dtype = _DTYPE_NAME_TO_DTYPE[name]
  
              # this if ignores float128 if it is not available on the user
              # system
              if dtype is not None:
                  result.add(dtype)
      return result
  
imports: from __future__ import print_function, division, absolute_import
  import numpy
  import six.moves
  import imgaug
label_desc: Use image node_id 17 for calling a global function with example usage: _convert_dtype_strs_to_types(dtypes) and returns: result