uot;</code>.</li><li>The closure is called again repeatedly with the updated accumulating
value and each element of the sequence.</li><li>When the sequence is exhausted, the accumulating value is returned to
the caller.</li></ol>

<p>If the sequence has no elements, <code>updateAccumulatingResult</code> is never
executed and <code>initialResult</code> is the result of the call to
<code>reduce(into:_:)</code>.</p>

<p><strong>Parameters:</strong>
  <strong>initialResult:</strong> The value to use as the init