code: function _getListedError (cartoError, errorList) {
    var errorListkeys = _.keys(errorList);
    var key;
    for (var i = 0; i < errorListkeys.length; i++) {
      key = errorListkeys[i];
      if (!(errorList[key].messageRegex instanceof RegExp)) {
        throw new Error('MessageRegex on ' + key + ' is not a RegExp.');
      }
      if (errorList[key].messageRegex.test(cartoError.message)) {
        return {
          friendlyMessage: _replaceRegex(cartoError, errorList[key]),
          errorCode: _buildErrorCode(cartoError, key)
        };
      }
    }
  
    // When cartoError not found return generic values
    return {
      friendlyMessage: cartoError.message || '',
      errorCode: _buildErrorCode(cartoError, 'unknown-error')
    };
  }
docs: Get the listed error from a cartoError, if no listedError is found return a generic
  unknown error.
  @param {CartoError} cartoError