def underlying_typedef_type(self):
        """Return the underlying type of a typedef declaration.

        Returns a Type for the typedef this cursor is a declaration for. If
        the current cursor is not a typedef, this raises.
        """
        if not hasattr(self, '_underlying_type'):
            assert self.kind.is_declaration()
            self._underlying_type = \
              conf.lib.clang_getTypedefDeclUnderlyingType(self)

        return self._underlying_type
Return the underlying type of a typedef declaration.

        Returns a Type for the typedef this cursor is a declaration for. If
        the current cursor is not a typedef, this raises.