<span class='op'>=</span> <span class='kw'>function</span><span class='op'>(</span><span class='va'>x</span>, <span class='va'>pkr</span><span class='op'>)</span> <span class='op'>{</span>
      <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span> <span class='op'>(</span>
        <span class='va'>pkr</span><span class='op'>$</span><span class='va'>inner_results</span><span class='op'>$</span><span class='va'>accepted_results</span><span class='op'>$</span><span class='va'>step_size</