code: def test_vstack(data):
      assert np.array_equal(
          hl.eval(hl.nd.vstack(data)), np.vstack(data)
      )
      assert np.array_equal(
          hl.eval(hl.nd.vstack(hl.array(list(data)))), np.vstack(data)
      )
  
imports: import math
  import numpy
  import re
  from ..helpers import *
  import pytest
  from hail.utils.java import FatalError, HailUserError
label_desc: Use image node_id 37 for calling a global function with example usage: test_vstack(data) without return types