code: def test_ndarray_container():
      x = np.array([1, 2, 3])
      y = np.array([4, 5, 6])
      arr = mxnet._ffi.convert_to_node([x, y])
      assert _np.array_equal(arr[0].asnumpy(), x.asnumpy())
      assert isinstance(arr[0], NDArray)
      amap = mxnet._ffi.convert_to_node({"x": x, "y": y})
      assert "x" in amap
      assert _np.array_equal(amap["y"].asnumpy(), y.asnumpy())
      assert isinstance(amap["y"], NDArray)
  
file_path: mxnet/tests/python/unittest/test_ffi_container.py
imports: import mxnet
  import numpy
  from mxnet import np, npx, _api_internal
  from mxnet.ndarray import NDArray
  from mxnet.test_utils import use_np
label_desc: Use image node_id 4 for calling a global function with example usage: test_ndarray_container() without return types