WeChat.CardManaging.batch_get_cards

You're seeing just the function batch_get_cards, go back to WeChat.CardManaging module for more information.
Link to this function

batch_get_cards(client, count, offset)

Specs

batch_get_cards(WeChat.client(), count :: integer(), offset :: integer()) ::
  WeChat.response()

批量查询卡券列表 - 官方文档

Link to this function

batch_get_cards(client, status_list, count, offset)

Specs

batch_get_cards(
  WeChat.client(),
  [WeChat.Card.card_status()],
  count :: integer(),
  offset :: integer()
) :: WeChat.response()

批量查询卡券列表 - 只获取指定状态 - 官方文档