code: def test_from_bytes_multigraph_graph(self):
      graph_data = b":An"
      G = nx.from_sparse6_bytes(graph_data)
      assert type(G) == nx.Graph
      multigraph_data = b":Ab"
      M = nx.from_sparse6_bytes(multigraph_data)
      assert type(M) == nx.MultiGraph
  
imports: from io import BytesIO
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 2 for calling the TestSparseGraph6 obj's underlying member method code with example usage: obj.test_from_bytes_multigraph_graph() without return types