class_docstr: Tracks the tree structure of a collection of ConjectureData
  objects, for use in ConjectureRunner.
docstr: Returns True if every possible node is dead and thus the language
  described must have been fully explored.
docstr_tok: ["Returns","True","if","every","possible","node","is","dead","and","thus","the","language","described","must","have","been","fully","explored","."]
code: def is_exhausted(self):
      """Returns True if every possible node is dead and thus the language
      described must have been fully explored."""
      return self.root.is_exhausted
  
imports: from __future__ import absolute_import, division, print_function
  import attr
  from hypothesis.errors import Flaky, HypothesisException
  from hypothesis.internal.compat import hbytes, int_to_bytes
  from hypothesis.internal.conjecture.data import ConjectureData, DataObserver, Status, StopTest, bits_to_bytes
  from hypothesis.internal.conjecture.junkdrawer import IntList
label_desc: Use image node_id 2 for calling the DataTree obj's underlying member method code with example usage: obj.is_exhausted() and returns: self