get stableDomRef() {
      return this.getAttribute("stable-dom-ref") || `${this._id}-stable-dom-ref`;
    }
@class
The <code>ui5-shellbar-item</code> represents a custom item, that
might be added to the <code>ui5-shellbar</code>.
<br><br>
<h3>ES6 Module Import</h3>
<code>import "@ui5/webcomponents-fiori/dist/ShellBarItem";</code>

@constructor
@author SAP SE
@alias sap.ui.webc.fiori.ShellBarItem
@extends sap.ui.webc.base.UI5Element
@abstract
@tagname ui5-shellbar-item
@implements sap.ui.webc.fiori.IShellBarItem
@public