code: def testInfixMatmulIsTfMatmul(self):
      a = ops.convert_to_tensor([[10.0, 20.0, 30.0]])
      b = ops.convert_to_tensor(
          [[40.0, 50.0], [60.0, 70.0], [80.0, 90.0]]
      )
      c = infix_matmul(a, b)
      self.assertEqual(c.op.type, "MatMul")
  
imports: import operator
  import numpy
  from tensorflow.python import tf2
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradient_checker_v2
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling the MatMulInfixOperatorTest obj's underlying member method code with example usage: obj.testInfixMatmulIsTfMatmul() without return types