">=</span> <a href="../types/Cacheable.html" class="tsd-signature-type tsd-kind-type-alias">Cacheable</a><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">key</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">MaybePromise</span><span class="tsd-signature-symbol">&lt;</span>