code: def test_is_valid_assignment(self):
      # Due to divisibility, the a dimension cannot be assigned to m1 or m2.
      self.assertFalse(
          self.valid_layouts.is_valid_assignment("a", "m1")
      )
      self.assertFalse(
          self.valid_layouts.is_valid_assignment("a", "m2")
      )
      # The b dimension can only be assigned to m2.
      self.assertFalse(
          self.valid_layouts.is_valid_assignment("b", "m1")
      )
      self.assertTrue(self.valid_layouts.is_valid_assignment("b", "m2"))
      # Due to ConcatOperation, the concat dimension may not be assigned.
      self.assertFalse(
          self.valid_layouts.is_valid_assignment("concat", "m1")
      )
      self.assertFalse(
          self.valid_layouts.is_valid_assignment("concat", "m2")
      )
  
file_path: mesh/mesh_tensorflow/auto_mtf/valid_layouts_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import mesh_tensorflow
  from mesh_tensorflow.auto_mtf import valid_layouts
  import tensorflow.compat.v1
label_desc: Use image node_id 4 for calling the LayoutValidatorTest obj's underlying member method code with example usage: obj.test_is_valid_assignment() without return types