ss="modifier"></span>
        <span class="kind">class</span>
      </span>
      <span class="symbol">
        <span class="name">MapFeature</span><span class="tparams">[<span name="TKey">TKey</span>, <span name="TValue">TValue</span>]</span><span class="result"> extends <a href="Feature.html" class="extype" name="com.johnsnowlabs.nlp.serialization.Feature">Feature</a>[<span class="extype" name="com.johnsnowlabs.nlp.serialization.MapFeature.TKey">TKey</span>, <span class="extype" name="com.johnsnowlabs.nlp