  <a id="exists(field:it.agilelab.bigdata.spark.search.dsl.field):it.agilelab.bigdata.spark.search.dsl.FieldExistsFilter"></a>
      <a id="exists(field):FieldExistsFilter"></a>
      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier"></span>
        <span class="kind">def</span>
      </span>
      <span class="symbol">
        <span class="name">exists</span><span class="params">(<span name="field">field: <a href="field.html" class="extype" name="it.agilelab.bigdata.s