code: def test_axis_insertion_3d(self, xp):
      def f1to2(x):
          """produces an asymmetric non-square matrix from x"""
          assert x.ndim == 1
          return x[::-1] * x[1:, None]
  
      # 3d insertion
      a3d = xp.arange(6 * 5 * 3).reshape((6, 5, 3))
      return xp.apply_along_axis(f1to2, self.axis, a3d)
  
file_path: cupy/tests/cupy_tests/lib_tests/test_shape_base.py
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 5 for calling the TestApplyAlongAxis obj's underlying member method code with example usage: obj.test_axis_insertion_3d(xp) and returns: xp, unknown