showImage method Null safety

Implementation

void showImage(BuildContext context) {
  showDialog(
    barrierDismissible: true,
    context: context,
    builder: (context) => Dialog(
      backgroundColor: Colors.transparent,
      child: ClipRRect(
        borderRadius: BorderRadius.circular(10),
        child: Stack(alignment: Alignment.centerLeft, children: [
          FadeInImage.memoryNetwork(
            fadeInDuration: const Duration(milliseconds: 400),
            fadeInCurve: Curves.easeInOut,
            fit: BoxFit.cover,
            placeholder: kTransparentImage,
            image: statement.statementPictureURL != null
                ? statement.statementPictureURL!.replaceAll(
                    "https%3A%2F%2Fparsefiles.back4app.com%2FFeP6gb7k9R2K9OztjKWA1DgYhubqhW0yJMyrHbxH%2F",
                    "")
                : "https://quellenreiter.app/assets/logo-pink.png",
          ),
          // Display [statement.samplePictureCopyright]
          RotatedBox(
            quarterTurns: 1,
            child: Container(
              padding: const EdgeInsets.all(2),
              color: const Color.fromARGB(61, 0, 0, 0),
              child: SelectableText(
                statement.samplePictureCopyright.trim(),
                style: Theme.of(context).textTheme.bodyText1,
              ),
            ),
          ),
          Positioned(
            top: 5,
            right: 5,
            child: IconButton(
              icon: const Icon(Icons.close),
              iconSize: 50,
              onPressed: () => Navigator.of(context).pop(context),
            ),
          ),
        ]),
      ),
    ),
  );
}