code: def get_initial_state(self):
      state = (self.init_pos, self.init_vel, self.log_radius)
      return self.t0, state
  
file_path: torchdiffeq/examples/bouncing_ball.py
imports: import argparse
  import matplotlib.pyplot
  import torch
  import torch.nn
  from torchdiffeq import odeint, odeint_adjoint
  from torchdiffeq import odeint_event
label_desc: Use image node_id 4 for calling the BouncingBallExample obj's underlying member method code with example usage: obj.get_initial_state() and returns: self,  state