octokit.net/Octokit.Reactive/Clients/IObservableGitDatabaseClient.cs

namespace Octokit.Reactive
{
    /// <summary>
    /// Used to maintain api structure therefore contains no methods
    /// </summary>
    public interface IObservableGitDatabaseClient
    {
        IObservableTagsClient Tag { get; set; }
    }
}