class_docstr: Wrap up custom function to be used as a predicate
  example: in_lambda(['labels_object_roles'], lambda labels_object_roles : len(labels_object_roles) > 3)
class_docstr_tok: ["Wrap","up","custom","function","to","be","used","as","a","predicate","example",":","in_lambda","(","[","'labels_object_roles","'","]",",","lambda","labels_object_roles",":","len","(","labels_object_roles",")",">","3",")"]
code: def get_fields(self):
      return set(self._predicate_fields)
  
imports: import abc
  import collections.abc
  import hashlib
  import numpy
  import six
  import sys
label_desc: Use image node_id 2 for calling the in_lambda obj's underlying member method code with example usage: obj.get_fields() and returns: set