private void UpdateSnapshot(List <SubjectValueMod> mods)
{
var subjId = mods.Last().SubjectID;
var subj = ComposeSubject(mods, subjId);
using (var db = CreateConnection(out LiteCollection <T> col))
{
if (!col.Update((long)subjId, subj))
{
throw Fault.Failed($"Update failed. Id not found: [{subjId}].");
}
}
}
