code: def BeginContact(self, contact):
      self._contact(contact, True)
  
imports: import math
  from typing import Optional, Union
  import numpy
  import gym
  from gym import spaces
  from gym.envs.box2d.car_dynamics import Car
  from gym.error import DependencyNotInstalled, InvalidAction
  from gym.utils import EzPickle
label_desc: Use image node_id 2 for calling the FrictionDetector obj's underlying member method code with example usage: obj.BeginContact(contact) without return types