public void Initialize()
{
IOSamples.ClearFolder();
IOSamples.CreateFiles("T1.txt", "Y1.yml", "J1.json");
IOSamples.CreateFolderAndFiles("inner1", "T2.txt");
// empty folder
IOSamples.CreateFolder("inner2");
IOSamples.CreateFolderAndFiles("inner3", "Y2.yml");
IOSamples.CreateFolderAndFiles("inner3/deeper", "J2.json", "T3.txt");
}