an><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
      </span>
      
      <p class="shortcomment cmt">Apply a binary operation op(into, from) on the tags of the k-mers at these positions,
writing the result in the tags of &quot;into&quot;, writing the zero value into the tags of &quot;from&quot;.</p><div class="fullcomment"><div class="comment cmt"><p>Apply a binary operation op(into, from) on the tags of the k-mers at these positions,
writing the result in the tags of &