Microsoft.VisualStudio.TestPlatform.Client.RequestHelper.ITestRequestManager.StartTestSession(Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.Payloads.StartTestSessionPayload, Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.Interfaces.ITestHostLauncher3, Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.ITestSessionEventsHandler, Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.ProtocolConfig)