pi-header-details qm-code-font" id="func"><span class="qm-api-javascript-header-function-name">func</span><span class="qm-api-javascript-header-function-args"></span></span><span class="qm-api-header-tags"></span></div></div></div></div><div class="qm-api-collapsible-content"><div class="qm-api-item-content"><div class="qm-api-description"><div class="qm-html-paragraph">The update function to use when calling .apply() </div></div></div></div></div></div><div class="qm-api-group qm-api-returns-group"><div cl