unity/EditorPlugin/NonUnity/ProtocolCompatibility.cs (8 lines of code) (raw):

using System; namespace JetBrains.Rider.Unity.Editor.NonUnity { public static class ProtocolCompatibility { public static Guid ProtocolGuid = new Guid("CA1BA338-CCA4-4E4D-8A49-B08F8E521651"); } }