private void OnEnable()
{
var sources = GetSources();
var listCommand = new ListCommand(sources);
var fsPackageProvider = new FileSystemPackageProvider();
var folderCommands = new FileSystemFolderCommands();
var classifyPackages = new ClassifyPackages(fsPackageProvider);
var downloadPackage = new DownloadPackage(sources, folderCommands);
var installCommand = new InstallCommand(
downloadPackage,
classifyPackages,
new FileSystemFolderCommands());
this.searchTab = new SearchTab(listCommand, installCommand);
}