code: def __init__(self, model_name, dataset_name, model_kwargs):
      GCN.__init__(self, in_channels=3, hidden_channels=5, num_layers=2)
      PyGModelHubMixin.__init__(
          self, model_name, dataset_name, model_kwargs
      )
  
file_path: pytorch_geometric/test/nn/test_model_hub.py
imports: import os
  from pathlib import Path
  from unittest.mock import Mock
  import pytest
  import torch
  from torch_geometric.nn import GCN
  from torch_geometric.nn.model_hub import PyGModelHubMixin
  from torch_geometric.testing import withPackage
label_desc: Use image node_id 1 to create a new DummyModel object from inherited base classes: GCN, PyGModelHubMixin with example: obj = DummyModel(model_name, dataset_name, model_kwargs)