dren(){return K.find(Ue,this._parent)}_getActiveElem(){return this._getChildren().find((t=>this._elemIsActive(t)))||null}_setInitialAttributes(t,e){this._setAttributeIfNotExists(t,"role","tablist");for(const t of e)this._setInitialAttributesOnChild(t)}_setInitialAttributesOnChild(t){t=this._getInnerElement(t);const e=this._elemIsActive(t),s=this._getOuterElement(t);t.setAttribute("aria-selected",e),s!==t&&this._setAttributeIfNotExists(s,"role","presentation"),e||t.setAttribute("tabindex","-1"),t...