-header-prototype"><span class="qm-api-javascript-header-prototype qm-api-header-details qm-code-font" id="hx.eventemitter"><span class="qm-api-javascript-prototype-name">hx.EventEmitter</span></span><span class="qm-api-header-tags"></span></div></span><span class="qm-changelog-javascript-method"><div class="qm-api-item-header qm-api-item-header-function"><span class="qm-api-javascript-header-function-signature qm-api-header-details qm-code-font" id="deregisterall"><span class="qm-api-javascript-header-func