Where does the cart-pole environment in the Julia official page come from?

[WuSiren]

What is the environment shown in the cart-pole illustration that appears on the machine learning tab of the Julia website? Which package does it come from? Are there any existing packages in Julia that can be used for conducting this experiment?

[xgdgsc]

https://juliareinforcementlearning.org/docs/rlenvs/#ReinforcementLearningEnvironments.CartPoleEnv-Tuple{}