code: def max_abs(tensor):
      return torch.max(torch.abs(tensor))
  
file_path: torchdiffeq/tests/gradient_tests.py
imports: import unittest
  import torch
  import torchdiffeq
  from problems import construct_problem, PROBLEMS, DEVICES, METHODS
label_desc: Use image node_id 1 for calling a global function with example usage: max_abs(tensor) and returns: torch