public InterpreterSetting get(String id) {
    return interpreterSettings.get(id);
  }
@Test
  void testInterpreterInclude() throws Exception {
    try {
      System.setProperty(ZeppelinConfiguration.ConfVars.ZEPPELIN_INTERPRETER_INCLUDES.getVarName(), "mock1");
      setUp();

      assertEquals(1, interpreterSettingManager.get().size());
      assertEquals("mock1", interpreterSettingManager.get().get(0).getGroup());
    } finally {
      System.clearProperty(ZeppelinConfiguration.ConfVars.ZEPPELIN_INTERPRETER_INCLUDES.getVarName());
    }
  }