| item | SearchItem to extract the value from. | 
| value | Resulting value. | 
| selector | Selector use to access an item value. If null, we will use the internal item value. | 
bool Returns true if we were able to select the value and convert it to a double.
Resolve a selector on an item and try to convert the selected value to a double.
[Description("Returns asset paths corresponding to a list of instance ids")]
[SearchExpressionEvaluator("IdsToPaths", SearchExpressionEvaluationHints.ThreadNotSupported, SearchExpressionType.Iterable)]
public static IEnumerable<SearchItem> IdsToPath(SearchExpressionContext c)
{
    foreach (var idItem in c.args[0].Execute(c))
    {
        if (SearchExpression.TryConvertToDouble(idItem, out var idNum))
        {
            var id = (int)idNum;
            var path = AssetDatabase.GetAssetPath(id);
            if (!string.IsNullOrEmpty(path))
            {
                yield return SearchExpression.CreateItem(path, c.ResolveAlias("asset path"));
            }
        }
    }
}