python says i have to fix some indent in the "class OBstaclesManager" line, it says expected indented block. what do i fix
class ObstaclesManager:
    def __init__(self):
        self.obstacles_list = []
    def generateobstacles(self):
        can_gen = True
        for obstacle in self.obstacles_list:
            if obstacle.x > win_w*0.75:
                can_gen = False
 
     
    