FileUpload with ImageEditor on save prevent redirect

How to prevent redirect on save, if on resource there is FileUpload with ImageEditor and also

protected function getRedirectUrl(): string
{
    return $this->previousUrl ?? $this->getResource()::getUrl('index');
}

protected function getRedirectUrl(): string
{
    return $this->previousUrl ?? $this->getResource()::getUrl('index');
}