def tagMap(self):
        """"Return a :class:`~pyasn1.type.tagmap.TagMap` object mapping
            ASN.1 tags to ASN.1 objects contained within callee.
        """
        try:
            return self._tagMap

        except AttributeError:
            self._tagMap = tagmap.TagMap(
                {self.tagSet: self},
                {eoo.endOfOctets.tagSet: eoo.endOfOctets},
                self
            )

            return self._tagMap