>&lt;-</span><span class='no'>GridSearchTrainer</span>$<span class='fu'>new</span>(<span class='kw'>trainer</span> <span class='kw'>=</span> <span class='no'>rf</span>,
                            <span class='kw'>parameters</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/list'>list</a></span>(<span class='kw'>n_estimators</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></spa