All functions are replaced with the same `new` function.

        Args:
            vroot (:obj:`Variable`): NNabla Variable
            entry_variables (:obj:`Variable`): Entry variable from which the conversion starts.

def convert(self, vroot, entry_variables):
        """
        All functions are replaced with the same `new` function.

        Args:
            vroot (:obj:`Variable`): NNabla Variable
            entry_variables (:obj:`Variable`): Entry variable from which the conversion starts.
        """
        self.graph_info = GraphInfo(vroot)
        self.entry_variables = entry_variables

        with nn.parameter_scope(self.name):
            # Function loop in the forward order
            for t, func in enumerate(self.graph_info.funcs):
                # Activation check
                if func.name in self.activation_functions:
                    activation_func = func
                    o = self._fixed_point_activation_conversion(
                        activation_func)
                    continue
                # Identity conversion
                o = self._identity_conversion(func)

        self.end_variable = o
        return self.end_variable