async focus(focusOptions) {
      await this._waitForDomRef();
      const focusDomRef = this.getFocusDomRef();
      if (focusDomRef && typeof focusDomRef.focus === "function") {
        focusDomRef.focus(focusOptions);
      }
    }
Set the focus to the element, returned by "getFocusDomRef()" (marked by "data-sap-focus-ref")
@param {FocusOptions} focusOptions additional options for the focus
@public