code: def test_iterate():
      expr = relay.Call(
          iterate(double, relay.const(2)), [make_nat_expr(prelude, 3)]
      )
      res = eval(relay.Function([], expr)())
      assert count(res) == 12
  
imports: import pytest
  import tvm
  from tvm import relay
  from tvm.relay import testing
  from tvm.relay.backend.interpreter import ConstructorValue
  from tvm.relay import create_executor
  from tvm.relay.prelude import Prelude, StaticTensorArrayOps
  from tvm.relay.testing import count, make_nat_value, make_nat_expr
  import numpy
label_desc: Use image node_id 38 for calling a global function with example usage: test_iterate() without return types