/// <summary>
/// Create a boost parameter
/// </summary>
/// <param name="documentSearch">Document search engine</param>
/// <param name="conditional">Conditional to add parameter</param>
/// <param name="query">Query used to make boost</param>
/// <param name="instance">Instance of boost ready to configure</param>
/// <returns>Document search engine</returns>
public static DocumentSearch <TDocument> BoostIf <TDocument>(this DocumentSearch <TDocument> documentSearch, Func <bool> conditional, Action <SearchQuery <TDocument> > query, Action <IBoostParameter <TDocument> > instance = null)
where TDocument : Document
{
Checker.IsNull(conditional);
if (conditional.Invoke())
{
documentSearch.Boost(query, instance);
}
return(documentSearch);
}