docstr: Returns a string that can be used in method name
docstr_tok: ["Returns","a","string","that","can","be","used","in","method","name"]
code: def get_func_str(self):
      """Returns a string that can be used in method name"""
      lst = []
      for k, _ in self._props:
          val = getattr(self, k)
          if val is True:
              val = "true"
          elif val is False:
              val = "false"
          else:
              val = str(val)
          lst.append("{}_{}".format(k, val))
      return "__".join(lst)
  
imports: import functools
  import chainer
  from chainer import backend
  from chainer.testing import _bundle
  from chainer.testing import attr
  import chainerx
label_desc: Use image node_id 9 for calling the BackendConfig obj's underlying member method code with example usage: obj.get_func_str() and returns: str