<PackageReference Include="Relativity.ObjectManager" Version="12.0.78.6" />

Relativity.Services.Matter.IMatterManager

public interface IMatterManager : IDisposable
Task<int> CreateSingleAsync(Matter matterDTO)

Task DeleteSingleAsync(int matterArtifactID)

Task<MatterQueryResultSet> QuerySubsetAsync(string queryToken, int start, int length)

Task<Matter> ReadSingleAsync(int matterArtifactID)