span class="extype" name="scala.Int">Int</span>]</span>, <span name="subOp">subOp: (<span class="extype" name="scala.Int">Int</span>, <span class="extype" name="scala.Double">Double</span>) ⇒ <span class="extype" name="scala.Double">Double</span></span>)</span><span class="result">: <span class="extype" name="scala.Double">Double</span></span>
      </span>
      </h4>
      <div class="fullcomment"><dl class="attributes block"> <dt>Attributes</dt><dd>protected </dd><dt>Definition Classes</dt><dd><a href=