class_docstr: Collection of _Hypothesis objects
class_docstr_tok: ["Collection","of","_Hypothesis","objects"]
code: def __contains__(self, hypothesis):
      return hypothesis in self.items
  
imports: import warnings
  from collections import defaultdict
  from math import log
label_desc: Use image node_id 6 for calling the _Stack obj's underlying member method code with example usage: obj.__contains__(hypothesis) and returns: unknown