/// <summary>
/// Create a facet range parameter
/// </summary>
/// <param name="documentSearch">Document search engine</param>
/// <param name="conditional">Conditional to add parameter</param>
/// <param name="aliasName">Name of alias added in query</param>
/// <param name="fieldExpression">Expression used to find field name</param>
/// <param name="gap">Size of each range bucket to make facet</param>
/// <param name="start">Lower bound to make facet</param>
/// <param name="end">Upper bound to make facet</param>
/// <param name="instance">Instance of parameter ready to configure</param>
/// <returns>Document search engine</returns>
public static DocumentSearch <TDocument> FacetRangeIf <TDocument>(this DocumentSearch <TDocument> documentSearch, Func <bool> conditional, string aliasName, Expression <Func <TDocument, object> > fieldExpression, string gap, string start, string end, Action <IFacetRangeParameter <TDocument> > instance = null)
where TDocument : Document
{
Checker.IsNull(conditional);
if (conditional.Invoke())
{
documentSearch.FacetRange(aliasName, fieldExpression, gap, start, end, instance);
}
return(documentSearch);
}