code: def test2x2(self):
      self._testAllFormats(
          superdiag=[1],
          maindiag=[2, 3],
          subdiag=[4],
          rhs=[[2, 1], [4, 3]],
      )
  
imports: import numpy
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import gradient_checker_v2
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import stateless_random_ops
  from tensorflow.python.ops.linalg import linalg_impl
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 6 for calling the TridiagonalMatMulOpsTest obj's underlying member method code with example usage: obj.test2x2() without return types