def _update_param(self):
        r"""Update parameters

        This method updates the values of the algorthm parameters with the
        methods provided

        """

        # Update the gamma parameter.
        if not isinstance(self._beta_update, type(None)):
            self._beta = self._beta_update(self._beta)

        # Update lambda parameter.
        if not isinstance(self._lambda_update, type(None)):
            self._lambda = self._lambda_update(self._lambda)
r"""Update parameters

        This method updates the values of the algorthm parameters with the
        methods provided