code: def available_models():
      return PretainedRegistry.MODELS.keys()
  
file_path: torch-points3d/torch_points3d/applications/pretrained_api.py
imports: import os
  import logging
  import urllib.request
  from omegaconf import DictConfig
  from torch_points3d.datasets.dataset_factory import instantiate_dataset
  from torch_points3d.models.model_factory import instantiate_model
  from torch_points3d.models.base_model import BaseModel
  from torch_points3d.datasets.base_dataset import BaseDataset
  from torch_points3d.utils.wandb_utils import Wandb
  from torch_points3d.metrics.model_checkpoint import ModelCheckpoint
label_desc: Use image node_id 3 for calling the PretainedRegistry obj's underlying member method code with example usage: obj.available_models() and returns: PretainedRegistry