docs: function decode(base32) {
    $.checkArgument(typeof base32 === 'string', 'Must be base32-encoded string');
    var data = [];
    for (var i=0; i<base32.length; i++) {
      var value = base32[i];
      $.checkArgument(value in CHARSET_INVERSE_INDEX, 'Non-base32, value '+ value);
      data.push(CHARSET_INVERSE_INDEX[value]);
    }
    return data;
  }