code: function raiseIndex() {
          index++;
  
          // If queued remove the previous bench.
          if (queued && index > 0) {
            shift.call(benches);
          }
          // If we reached the last index then return `false`.
          return (queued ? benches.length : index < result.length)
            ? index
            : (index = false);
        }
docs: Raises `index` to the next defined index or returns `false`.