docs: function createHashtable(checksums) {
    var hashtable = {};
    var len = checksums.length;
    var checksum;
    var weak16;
  
    for (var i = 0; i < len; i++) {
      checksum = checksums[i];
      weak16 = calcWeak16(checksum.weak);
      if (hashtable[weak16]) {
        hashtable[weak16].push(checksum);
      } else {
        hashtable[weak16] = [checksum];
      }
    }
    return hashtable;
  }