||Reference to the variant ID (internal ID). This is no a public Id, but the 'primary key/identifier' of that variant inside a given Beacon instance. Therefore, different Beacon instances could have a variantInternalId = 1 and they could refer to completely unrelated variants. The public, standard, popular identifiers or the GA4GH Variant Representation Id (VRSid) MUST be returned in the 'identifiers' section. A Beacon instance can, of course, use the VRSid as their own internal id, in such case, the VRSid would be repeated in both places.