public void UnInstall(IExtension extension)
{
_OnUninstallExtensionSource?.Raise(extension, EventArgs.Empty);
extension?.OnPaneUnload();
extension.SendMessage -= DoSendMessage;
_extensions.Remove(_extensions.Where(x => x.Manifest.UniqueID == extension.ExtensionManifest.UniqueID).FirstOrDefault());
_OnDidUninstallExtensionSource?.Raise(extension, EventArgs.Empty);
}