code: def test_matrix_representation_belongs(self, n_points, atol):
      vec = gs.reshape(
          gs.random.rand(n_points * self.space.dim), (n_points, -1)
      )
      point = self.space.matrix_representation(vec)
  
      self.test_belongs(point, gs.ones(n_points, dtype=bool), atol)
  
imports: import pytest
  import geomstats.backend
  from geomstats.test.random import EmbeddedSpaceRandomDataGenerator, MatrixVectorSpaceRandomDataGenerator, VectorSpaceRandomDataGenerator
  from geomstats.test.vectorization import generate_vectorization_data
  from geomstats.test_cases.geometry.complex_manifold import ComplexManifoldTestCase
  from geomstats.test_cases.geometry.manifold import ManifoldTestCase
  from geomstats.test_cases.geometry.mixins import ProjectionTestCaseMixins
  from geomstats.vectorization import get_batch_shape
label_desc: Use image node_id 7 for calling the MatrixVectorSpaceTestCase obj's underlying member method code with example usage: obj.test_matrix_representation_belongs(n_points, atol) without return types