i}&#34;),) for i in range(len(vfuncs))
                ]
            # convert vfunc keys to singleton tuples
            self.vfuncs = dict(zip(vfunc_keys, vfuncs))
        # if needed, wrap the vfuncs in the Vfunc or AsyncVfunc class
        for k, v in self.vfuncs.items():
            if self._async:
                if not isinstance(v, AsyncVfunc):
                    self.vfuncs[k] = AsyncVfunc(k[0], v)
            elif not isinstance(v, Vfunc):
                self.vfuncs[k] = Vfunc(k[0], v)

    def 