public void installAll() {
    for (AvailableInterpreterInfo info : availableInterpreters) {
      install(info.name, info.artifact);
    }
  }
@Test
  void installAll() {
    installer.installAll();
    assertTrue(new File(interpreterBaseDir, "intp1").isDirectory());
    assertTrue(new File(interpreterBaseDir, "intp2").isDirectory());
  }