/// <summary>Returns the ParseItem located at the specified position.</summary>
public ParseItem ItemAtPosition(int position)
{
return(ParseItems?.FirstOrDefault(p => p.Span.Contains(position - 1)));
}
/// <summary>Returns all the parse items contained within the specified span.</summary>
public IEnumerable <ParseItem> ItemsInSpan(Span span)
{
return(ParseItems?.Where(i => span.Contains(i.Span)));
}
