code: def boolean(
          element_name,  # type: Text
          attribute=None,  # type: Optional[Text]
          required=True,  # type: bool
          alias=None,  # type: Optional[Text]
          default=False,  # type: Optional[bool]
          omit_empty=False,  # type: bool
          hooks=None  # type: Optional[Hooks]
  ):
      # type: (...) -> Processor
      
      return _PrimitiveValue(
          element_name,
          _parse_boolean,
          attribute,
          required,
          alias,
          default,
          omit_empty,
          hooks
      )
docs: Create a processor for boolean values.
  
      :param element_name: Name of the XML element containing the value. Can also be specified
          using supported XPath syntax.
      :param attribute: If specified, then the value is searched for under the
          attribute within the element specified by element_name. If not specified,
          then the value is searched for as the contents of the element specified by
          element_name.
      :param required: Indicates whether the value is required when parsing and serializing.
      :param alias: If specified, then this is used as the name of the value when read from
          XML. If not specified, then the element_name is used as the name of the value.
      :param default: Default value to use if the element is not present. This option is only
          valid if required is specified as False.
      :param omit_empty: If True, then Falsey values will be omitted when serializing to XML. Note
          that Falsey values are never omitted when they are elements of an array. Falsey values can
          be omitted only when they are standalone elements.
      :param hooks: A Hooks object.
  
      :return: A declxml processor object.