 for
            the unique element of the covariance matrix of the random effects; default is
            0.01.</p></dd>

        <dt>parscale_phis</dt>
<dd><p>the control argument <code>parscale</code> of <code><a href="https://rdrr.io/r/stats/optim.html" class="external-link">optim</a></code> for
            the extra (dispersion/shape) parameters; default is 0.01.</p></dd>

        <dt>tol1, tol2, tol3</dt>
<dd><p>numeric scalars controlling tolerances for declaring
            convergence; <code>tol1</