, default=None</span>
<span class="sd">            Target values (None for unsupervised transformations).</span>
<span class="sd">        Returns</span>
<span class="sd">        -------</span>
<span class="sd">        ARMARegressor</span>
<span class="sd">            Self.</span>
<span class="sd">        """</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">estimator</span><span class="o">.</span><span class="n">fit</span><span class="p">(</span><span class="n">X</span><span