<PackageReference Include="Relativity.Server.ObjectManager.SDK" Version="5001.0.3" />

Relativity.ObjectManager.V1.Models.SearchProviderConditions

Contains the parameters used to execute a query through a search provider.
public string Input { get; set; }

Gets or sets a string containing the parameters used for a search provider, which were entered by a user.

public SearchIndexRef SearchIndex { get; set; }

Gets or sets the Artifact ID of the search provider.