Decorator On 'left_chat_member'

[R3flector]

@On('left_chat_member')

---

Error: Invalid L1 filter 'left_chat_member' given in 'left_chat_member'. Permitted values are: 'message', 'edited_message', 'channel_post', 'edited_channel_post', 'inline_query', 'chosen_inline_result', 'callback_query', 'shipping_query', 'pre_checkout_query', 'poll', 'poll_answer', 'my_chat_member', 'chat_member', 'chat_join_request'.

My knowledge is not enough to make it work. Anyone can help?