Custom auto open utility bar without popout button by aura

cmp

<aura:compomemt implements="lightning:utilityItem">

    <!-- define popout to false -->

    <aura:attribute name="supportsPopOut" type="Boolean" default="false" />

    <!-- auto open utility bar when init -->

    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>

    <!-- use lightning:utilityBarAPI -->

    <lightning:utilityBarAPI aura:id="utilitybar" />

    someting else

</aura:compomemt>

controller.js

doInit: function(component) {

    var utilityApi = component.find("utilitybar");

    utilityApi.getAllUtilityInfo().then(fuction (response) {

        if (typeof response != "undefined") {

            utilityApi.openUtility();

        }

    });

}