/em> evaluates to <code>true</code>. Failure to satisfy that
assumption is a serious programming error.</p></li></ul>

<p><strong>Parameters:</strong>
  <strong>condition:</strong> The condition to test. <code>condition</code> is not evaluated in
    <code>-Ounchecked</code> builds.
  <strong>message:</strong> A string to print if <code>condition</code> is evaluated to <code>false</code> in a
    playground or <code>-Onone</code> build. The default is an empty string.
  <strong>file:</strong> The file name 