private void InitializeExtensions(IEnumerable <string> sources)
        {
            var extensionsFromSource = this.testHostManager.GetTestPlatformExtensions(sources, Enumerable.Empty <string>());

            if (extensionsFromSource.Any())
            {
                TestPluginCache.Instance.UpdateExtensions(extensionsFromSource, false);
            }

            // We don't need to pass list of extension as we are running inside vstest.console and
            // it will use TestPluginCache of vstest.console
            discoveryManager.Initialize(Enumerable.Empty <string>(), null);
        }