code: def test_invalid_nesting_fusion(self):
      self.assertRaises(
          ValueError,
          lambda: parse_composition(Fuse(Fuse("a", "b"), "c")),
      )
      self.assertRaises(
          ValueError,
          lambda: parse_composition(
              Fuse(Split("a", "b", splits=128), "c")
          ),
      )
  
imports: import unittest
  import torch
  import adapters
  from adapters import IA3Config, LoRAConfig, PrefixTuningConfig, SeqBnConfig
  from adapters.composition import Average, BatchSplit, Fuse, Parallel, Split, Stack, parse_composition
  from tests.test_adapter import ids_tensor
  from transformers import BertConfig, BertForSequenceClassification
  from transformers.testing_utils import require_torch, torch_device
label_desc: Use image node_id 3 for calling the AdapterCompositionParsingTest obj's underlying member method code with example usage: obj.test_invalid_nesting_fusion() without return types