Microsoft.CodeAnalysis.FindSymbols.IRemoteSymbolFinderService.ICallback.OnReferenceFoundAsync(Microsoft.CodeAnalysis.Remote.RemoteServiceCallbackId, Microsoft.CodeAnalysis.Remote.SerializableSymbolGroup, Microsoft.CodeAnalysis.Remote.SerializableSymbolAndProjectId, Microsoft.CodeAnalysis.Remote.SerializableReferenceLocation, System.Threading.CancellationToken)