code: def test_not_enough_graphs(self):
      iterator = utils.dynamically_batch(
          iter([self._global_graph]), n_node=5, n_edge=5, n_graph=1
      )
      self.assertRaisesRegex(
          ValueError, "The number of graphs*", lambda: next(iterator)
      )
  
imports: import functools
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax.lib import xla_bridge
  import jax.numpy
  import jax.tree_util
  from jraph._src import graph
  from jraph._src import utils
  import numpy
label_desc: Use image node_id 4 for calling the DynamicBatchTest obj's underlying member method code with example usage: obj.test_not_enough_graphs() without return types