">/**
 * Load configs of an element in `extends`.
 * @param {string} extendName The name of a base config.
 * @param {ConfigArrayFactoryLoadingContext} ctx The loading context.
 * @returns {IterableIterator&lt;ConfigArrayElement&gt;} The normalized config.
 * @private
 */</span>
<span class="token function">_loadExtendedBuiltInConfig</span><span class="token punctuation">(</span><span class="token parameter">extendName<span class="token punctuation">,</span> ctx</span><span class="token punctuation">)</span