How to use the gunicorn.arbiter.Arbiter function in gunicorn

def test_arbiter_reexec_limit_child(fork):
    arbiter = gunicorn.arbiter.Arbiter(DummyApplication())
    arbiter.master_pid = ~os.getpid()
    arbiter.reexec()
    assert fork.called is False, "should not fork when arbiter is a child"

def test_arbiter_reexec_limit_parent(fork):
    arbiter = gunicorn.arbiter.Arbiter(DummyApplication())
    arbiter.reexec_pid = ~os.getpid()
    arbiter.reexec()
    assert fork.called is False, "should not fork when there is already a child"

def test_env_vars_available_during_preload():
    """Ensure that configured environmental variables are set during the
    initial set up of the application (called from the .setup() method of
    the Arbiter) such that they are available during the initial loading
    of the WSGI application.
    """
    # Note that we aren't making any assertions here, they are made in the
    # dummy application object being loaded here instead.
    gunicorn.arbiter.Arbiter(PreloadedAppWithEnvSettings())

def test_env_vars_available_during_preload():
    """Ensure that configured environmental variables are set during the
    initial set up of the application (called from the .setup() method of
    the Arbiter) such that they are available during the initial loading
    of the WSGI application.
    """
    # Note that we aren't making any assertions here, they are made in the
    # dummy application object being loaded here instead.
    gunicorn.arbiter.Arbiter(PreloadedAppWithEnvSettings())

def test_arbiter_stop_does_not_unlink_systemd_listeners(close_sockets):
    arbiter = gunicorn.arbiter.Arbiter(DummyApplication())
    arbiter.systemd = True
    arbiter.stop()
    close_sockets.assert_called_with([], False)

def run(self, handler):
        import gunicorn.arbiter
        gunicorn.arbiter.Arbiter((self.host, self.port), 4, handler).run()

def run(self):
        try:
            Arbiter(self).run()
        except RuntimeError as e:
            print("\nError: %s\n" % e, file=sys.stderr)
            sys.stderr.flush()
            sys.exit(1)

def run(self, handler):
        from gunicorn.arbiter import Arbiter
        from gunicorn.config import Config
        handler.cfg = Config({'bind': "%s:%d" % (self.host, self.port), 'workers': 4})
        arbiter = Arbiter(handler)
        arbiter.run()

def run(self, handler):
        import gunicorn.arbiter
        gunicorn.arbiter.Arbiter((self.host, self.port), 4, handler).run()

def run(self, handler):
        import gunicorn.arbiter
        gunicorn.arbiter.Arbiter((self.host, self.port), 4, handler).run()