allowedEanExtensions property
Allowed extension lengths for EAN or UPC barcodes. Other formats will ignore this.
Maps to an {@code int[]} of the allowed extension lengths, for example 2, 5, or 2, 5.
If it is optional to have an extension, do not set this hint. If this is set,
and a UPC or EAN barcode is found but an extension is not, then no result will be returned
at all.
Implementation
static final allowedEanExtensions = DecodeHintType<List<int>>();