class_docstr: A slot storing a truth value.
class_docstr_tok: ["A","slot","storing","a","truth","value","."]
code: def _feature_dimensionality(self) -> int:
      return len(self.as_feature())
  
imports: import logging
  from abc import ABC, abstractmethod
  from typing import Any, Dict, List, Optional, Text, Type
  import rasa.shared.core.constants
  from rasa.shared.exceptions import RasaException
  import rasa.shared.utils.common
  import rasa.shared.utils.io
  from rasa.shared.constants import DOCS_URL_SLOTS
label_desc: Use image node_id 2 for calling the BooleanSlot obj's underlying member method code with example usage: obj._feature_dimensionality() and returns: len