ArrayList<String> getPotionsToRemove() - list of potions that are being removed.
void addPotion(Class potionClass, Color liquidColor, Color hybridColor, Color spotsColor, String potionID) - add a new custom potion to the game.
void addPotion(Class potionClass, Color liquidColor, Color hybridColor, Color spotsColor, String potionID, AbstractPlayer.PlayerClass playerClass) - add a new class specific custom potion to the game.
Not currently workingvoid removePotion(String potionID) - remove a potion from the game.