async connectedCallback() {
      const ctor = this.constructor;
      this.setAttribute(ctor.getMetadata().getPureTag(), "");
      if (ctor.getMetadata().supportsF6FastNavigation()) {
        this.setAttribute("data-sap-ui-fastnavgroup", "true");
      }
      const slotsAreManaged = ctor.getMetadata().slotsAreManaged();
      this._inDOM = true;
      if (slotsAreManaged) {
        // always register the observer before yielding control to the main thread (await)
        this._startObservingDOMChildren();
        await this._processChildren();
      }
      if (!this._inDOM) {
        // Component removed from DOM while _processChildren was running
        return;
      }
      (0, _Render.renderImmediately)(this);
      this._domRefReadyPromise._deferredResolve();
      this._fullyConnected = true;
      this.onEnterDOM();
    }
Do not call this method from derivatives of UI5Element, use "onEnterDOM" only
@private