code: def test_dynamic_graph_static_signal_typing_batch():
      dataset = DynamicGraphStaticSignalBatch(
          [None], [None], None, [None], [None]
      )
      for snapshot in dataset:
          assert snapshot.edge_index is None
          assert snapshot.edge_attr is None
          assert snapshot.x is None
          assert snapshot.y is None
          assert snapshot.batch is None
  
imports: import numpy
  import networkx
  from torch_geometric_temporal.signal import temporal_signal_split
  from torch_geometric_temporal.signal import StaticGraphTemporalSignalBatch
  from torch_geometric_temporal.signal import DynamicGraphTemporalSignalBatch
  from torch_geometric_temporal.signal import DynamicGraphStaticSignalBatch
  from torch_geometric_temporal.signal import StaticHeteroGraphTemporalSignalBatch
  from torch_geometric_temporal.signal import DynamicHeteroGraphTemporalSignalBatch
  from torch_geometric_temporal.signal import DynamicHeteroGraphStaticSignalBatch
label_desc: Use image node_id 14 for calling a global function with example usage: test_dynamic_graph_static_signal_typing_batch() without return types