class="kt">String</span>

    <span class="kd">enum</span> <span class="kt">CodingKeys</span><span class="p">:</span> <span class="kt">String</span><span class="p">,</span> <span class="kt">CodingKey</span> <span class="p">{</span>
        <span class="c1">// this is the custom key that you define manually</span>
        <span class="k">case</span> <span class="n">firstName</span> <span class="o">=</span> <span class="s">"first_name"</span>

<span class="c1">// sourcery:inline:auto:Person.CodingKeys.AutoCod