s="hljs-number">3</span>) {
        <span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Error</span>(<span class="hljs-string">'Invalid!'</span>);
    }
    <span class="hljs-keyword">const</span> value = isPresentInMap ? <span class="hljs-variable language_">this</span>.<span class="hljs-title function_">get</span>(key) : <span class="hljs-title function_">thunk</span>(key, <span class="hljs-variable language_">this</span>);
    <span class="hljs-ke