def battle_remove(self, battle_id):
        if self.battles in battle_id:
            self.battles_delete.append(battle_id)
    
# ********************** NPC Functions **********************
# Here exist all the function that the world uses to manage active npcs
dataset/ETHPy150Open shinymud/ShinyMUD/src/shinymud/lib/world.py/World.battle_remove/swapped operands of `in`