code: def test_fixed_points():
      assert str(FixedPoints(1024)) == "FixedPoints(1024, replace=True)"
  
      data = Data(
          pos=torch.randn(100, 3),
          x=torch.randn(100, 16),
          y=torch.randn(1),
          edge_attr=torch.randn(100, 3),
          num_nodes=100,
      )
  
      out = FixedPoints(50, replace=True)(data)
      assert len(out) == 5
      assert out.pos.size() == (50, 3)
      assert out.x.size() == (50, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 50
  
      out = FixedPoints(200, replace=True)(data)
      assert len(out) == 5
      assert out.pos.size() == (200, 3)
      assert out.x.size() == (200, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 200
  
      out = FixedPoints(50, replace=False, allow_duplicates=False)(data)
      assert len(out) == 5
      assert out.pos.size() == (50, 3)
      assert out.x.size() == (50, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 50
  
      out = FixedPoints(200, replace=False, allow_duplicates=False)(
          data
      )
      assert len(out) == 5
      assert out.pos.size() == (100, 3)
      assert out.x.size() == (100, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 100
  
      out = FixedPoints(50, replace=False, allow_duplicates=True)(data)
      assert len(out) == 5
      assert out.pos.size() == (50, 3)
      assert out.x.size() == (50, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 50
  
      out = FixedPoints(200, replace=False, allow_duplicates=True)(data)
      assert len(out) == 5
      assert out.pos.size() == (200, 3)
      assert out.x.size() == (200, 16)
      assert out.y.size() == (1,)
      assert out.edge_attr.size() == (100, 3)
      assert out.num_nodes == 200
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_fixed_points() without return types