span class="r-pr">#&gt;</span>   Flat problem:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   An object of class flat_ml_fit_problem</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     Dimensions: 5 groups, 8 target values</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     Model matrix type: combined</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     Original fitting problem:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>     An obj