code: def test_trivial_loop(self):
      assert (
          hl.eval(hl.experimental.loop(lambda recur: 0, hl.tint32)) == 0
      )
  
imports: import numpy
  import hail
  import unittest
  import pytest
  from ..helpers import *
  from hail.utils import new_temp_file
label_desc: Use image node_id 17 for calling the Tests obj's underlying member method code with example usage: obj.test_trivial_loop() without return types