code: def f(self, t, y):
      return y
  
imports: import argparse
  import logging
  import os
  import time
  import numpy.random
  import torch
  import torchsde
  from diagnostics import utils
label_desc: Use image node_id 2 for calling the SDE obj's underlying member method code with example usage: obj.f(t, y) and returns: y