code: def _levy_returns():
      yield "none", False, False
      yield "space-time", False, False
      yield "space-time", True, False
      for levy_area_approximation in ("davie", "foster"):
          for return_U in (True, False):
              for return_A in (True, False):
                  yield levy_area_approximation, return_U, return_A
  
file_path: torchsde/tests/test_brownian_interval.py
imports: import sys
  import math
  import numpy.random
  import torch
  from scipy.stats import kstest
  import pytest
  import torchsde
label_desc: Use image node_id 3 for calling a global function with example usage: _levy_returns() without return types