code: def forward(self, x):
      return torch.sin(x)
  
imports: import argparse
  import os
  import math
  import matplotlib.pyplot
  import torch
  import torch.nn
  from torchdiffeq import odeint, odeint_event
  from bouncing_ball import BouncingBallExample
label_desc: Use image node_id 1 for calling the Sine obj's underlying member method code with example usage: obj.forward(x) and returns: torch