docs: def get_bool(self, key, default=None):
          """
          Args:
              key (str | unicode): Key to lookup
              default (bool | None): Default to use if key is not configured
  
          Returns:
              (bool | None): Value of key, if defined
  
          """
          value = self.get_str(key)
          if value is not None:
              return to_boolean(value)
  
          return default