<PackageReference Include="Relativity.Server.Extensibility.SDK" Version="1.5.3" />

Relativity.Extensibility.V1.SearchProviderManager.Models.SearchProviderResult

public class SearchProviderResult
Object that is returned when making calls to the Search Provider Manager service

Collection of the distinct markup used by the search providers

public string Message { get; set; }

String that will contain error messages, if any.

public List<SearchProvider> SearchProviders { get; set; }

Collection of the available search providers

public bool Success { get; set; }

Boolean value indicating whether the service call was a success or not.