def install(self):
        if self._pebble.firmware_version.major < 3:
            self._install_legacy2()
        else:
            self._install_modern()
Test if it runs a2enconf for the given conf.
dataset/ETHPy150Open pebble/libpebble2/libpebble2/services/install.py/AppInstaller.install--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/deb_apache_test.py/DebApacheTestCase.test_a2enconf_notfound