>T &lt;: <a href="QueryRewrite.html" class="extype" name="net.sansa_stack.query.spark.ontop.QueryRewrite">QueryRewrite</a></span>]</span><span class="result"> extends <span class="extype" name="scala.AnyRef">AnyRef</span></span>
      </span>
      
      
    </li><li name="net.sansa_stack.query.spark.ontop.SparkNullIgnoringDBGroupConcatFunctionSymbol" visbl="pub" class="indented0 " data-isabs="false" fullComment="no" group="Ungrouped">
      <a id="SparkNullIgnoringDBGroupConcatFunctionSymbolextendsNullIg