code: def test_n_data_n_conversion(self):
      for i in [
          0,
          1,
          42,
          62,
          63,
          64,
          258047,
          258048,
          7744773,
          68719476735,
      ]:
          assert g6.data_to_n(g6.n_to_data(i))[0] == i
          assert g6.data_to_n(g6.n_to_data(i))[1] == []
          assert g6.data_to_n(g6.n_to_data(i) + [42, 43])[1] == [42, 43]
  
imports: from io import BytesIO
  import pytest
  import networkx
  import networkx.readwrite.graph6
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 1 for calling the TestGraph6Utils obj's underlying member method code with example usage: obj.test_n_data_n_conversion() without return types