class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def test_to_dense_4x4(self):
      perm = [0, 1, 2, 3]
      self.assertAllClose(
          permutation.LinearOperatorPermutation(perm).to_dense(),
          linalg_ops.eye(4),
      )
      perm = [1, 0, 3, 2]
      self.assertAllClose(
          permutation.LinearOperatorPermutation(perm).to_dense(),
          [
              [0.0, 1, 0, 0],
              [1.0, 0, 0, 0],
              [0.0, 0, 0, 1],
              [0.0, 0, 1, 0],
          ],
      )
      perm = [3, 2, 0, 1]
      self.assertAllClose(
          permutation.LinearOperatorPermutation(perm).to_dense(),
          [
              [0.0, 0, 0, 1],
              [0.0, 0, 1, 0],
              [1.0, 0, 0, 0],
              [0.0, 1, 0, 0],
          ],
      )
  
imports: from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import config
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops.linalg import linalg
  from tensorflow.python.ops.linalg import linear_operator_permutation
  from tensorflow.python.ops.linalg import linear_operator_test_util
  from tensorflow.python.platform import test
label_desc: Use image node_id 7 for calling the LinearOperatorPermutationTest obj's underlying member method code with example usage: obj.test_to_dense_4x4() without return types