_1_ctxt.html#a151d7507c39014fe92da71b22d9fdaf1">isEmpty</a>(), <span class="stringliteral">&quot;Ciphertext cannot be empty&quot;</span>);</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    assertTrue&lt;InvalidArgument&gt;(nPowers &gt; 0, <span class="stringliteral">&quot;Must have positive nPowers&quot;</span>);</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</