dist/bundle.js
function getCardId(o) {
  return o.master + '#' + o.combination.front.join(',') + '@' + o.combination.back.join(',');
}
function getCardId(o) {
  return o.master + '#' + o.combination.front.join(',') + '@' + o.combination.back.join(',');
}
function getCardId ( o ) { return o . master + '#' + o . combination . front . join ( ',' ) + '@' + o . combination . back . join ( ',' ) ; }
numbers are indexes on master.fields
numbers are indexes on master . fields