code: def test_dynamic_backend_all_combos(middle_backend, end_backend):
      # create an ivy array, container and native container
      a = ivy.array([1, 2, 3])
      b = ivy.array([4, 5, 6])
      ivy_cont = ivy.Container({"w": a, "b": b})
  
      # clear the backend stack after initialization of inputs
      ivy.unset_backend()
  
      # set dynamic_backend to false for all objects
      ivy_cont.dynamic_backend = False
      a.dynamic_backend = False
      b.dynamic_backend = False
  
      # set the middle backend
      ivy.set_backend(middle_backend, dynamic=True)
      var_cont = ivy.Container(
          {
              "w": ivy.gradients._variable(ivy.array([10, 20, 30])),
              "b": ivy.gradients._variable(ivy.array([40, 50, 60])),
          }
      )
      # set dynamic_backend to true for all objects
      ivy_cont.dynamic_backend = True
      a.dynamic_backend = True
      b.dynamic_backend = True
  
      # set the final backend
      ivy.set_backend(end_backend, dynamic=True)
  
      # add the necessary asserts to check if the data
      # of the objects are in the correct format
  
      assert isinstance(a.data, ivy.NativeArray)
      assert isinstance(ivy_cont["b"].data, ivy.NativeArray)
  
      if {"numpy", "jax"}.intersection([middle_backend, end_backend]):
          # these frameworks don't support native variables
          assert isinstance(var_cont["b"].data, ivy.NativeArray)
      else:
          assert ivy.gradients._is_variable(var_cont["b"])
  
file_path: ivy/ivy_tests/test_ivy/test_misc/test_backend_utils/test_backend_handler.py
imports: from packaging import version
  import pytest
  import importlib
  import types
  import numpy
  import ivy
  from ivy.utils.backend.handler import _backend_dict
  from ivy_tests.test_ivy.helpers.available_frameworks import _available_frameworks
label_desc: Use image node_id 3 for calling a global function with example usage: test_dynamic_backend_all_combos(middle_backend, end_backend) without return types