pub fn get_pet_rarity_id_by_weights(
rng: &mut StdRng,
rarity_weights: &[PetCaseRarityWeight],
) -> Result<PetRarityId>pub fn get_pet_rarity_id_by_weights(
rng: &mut StdRng,
rarity_weights: &[PetCaseRarityWeight],
) -> Result<PetRarityId>