lib/index.js
function aliasesTaken (arr) {
  var taken
  for (var ind in arr) {
    if (!arr.hasOwnProperty(ind)) continue;
    if (aliasTaken(arr[ind]) !== false) return arr[ind];
  }
  return false;
}
function aliasesTaken (arr) {
  var taken
  for (var ind in arr) {
    if (!arr.hasOwnProperty(ind)) continue;
    if (aliasTaken(arr[ind]) !== false) return arr[ind];
  }
  return false;
}
function aliasesTaken ( arr ) { var taken for ( var ind in arr ) { if ( ! arr . hasOwnProperty ( ind ) ) continue ; if ( aliasTaken ( arr [ ind ] ) !== false ) return arr [ ind ] ; } return false ; }
return false if _any_ one of them is in use
return false if _any_ one of them is in use