ction"><span class="Identifier">Transaction</span></a><span class="Other">;</span> <span class="Identifier">key</span><span class="Other">,</span> <span class="Identifier">value</span><span class="Other">:</span> <span class="Identifier">string</span><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Identifier">KeyError</span><span class="Oth