topifnot.html" class="external-link">stopifnot</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/character.html" class="external-link">is.character</a></span><span class="op">(</span><span class="va">response</span><span class="op">)</span>, </span>
<span>            <span class="fu"><a href="https://rdrr.io/r/base/length.html" class="external-link">length</a></span><span class="op">(</span><span class="va">response</span><span class="op">)</span> <span class="op">==</span>