private Bitmap getThumbnailBitmap(String thumbnailPath) {
        // Thumbnail from absolute path
        Bitmap photo = BitmapFactory.decodeFile(thumbnailPath);

        if (photo == null) {
            // Try to find the thumbnail from assets
            AssetManager assetManager = getReactApplicationContext().getAssets();
            InputStream inputStream = null;
            try {
                inputStream = assetManager.open(thumbnailPath);
                photo = BitmapFactory.decodeStream(inputStream);
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return photo;
    }
Retrieves <code>contact</code> for contact, or <code>null</code> if not
available.

@param contactId contact identifier, <code>recordID</code>
android/src/main/java/com/rt2zz/reactnativecontacts/impl/ContactsManagerImpl.java