code: def test_to_lower_triangular_diagonal_scaled_is_lower_triangular(
      self, n_points, atol
  ):
      square_mat = self.data_generator.random_square_mat(n_points)
  
      mat = Matrices.to_lower_triangular_diagonal_scaled(square_mat)
      res = Matrices.is_lower_triangular(mat, atol=atol)
  
      self.assertAllEqual(res, True)
  
imports: import pytest
  import geomstats.backend
  from geomstats.geometry.matrices import Matrices
  from geomstats.test.test_case import TestCase
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.base import MatrixVectorSpaceTestCase
  from geomstats.test_cases.geometry.euclidean import EuclideanMetricTestCase
label_desc: Use image node_id 28 for calling the MatrixOperationsTestCase obj's underlying member method code with example usage: obj.test_to_lower_triangular_diagonal_scaled_is_lower_triangular(n_points, atol) without return types