private void addObjectReferenceToList(IFormula formula, IDictionary <string, int> list, IObjectReference objectReference)
{
var alias = Regex.Replace(objectReference.Alias, @"\s", "_");
try
{
list.Add(alias, idFor(objectReference.Object));
}
catch (ArgumentException ex)
{
throw new ArgumentException(Error.AliasAlreadyUsedInFormula(alias, formula.ToString()), ex);
}
}