code: def subset(self, x):
      return x[..., : self.hparams.output_dim].mean(dim=-2)
  
imports: import warnings
  import torch
  import torch.nn
  from omegaconf import DictConfig
  from pytorch_tabular.models.common.layers import Embedding1dLayer
  from pytorch_tabular.utils import get_logger
  from ..base_model import BaseModel
  from ..common import activations
  from ..common.layers import Lambda
  from .architecture_blocks import DenseODSTBlock
label_desc: Use image node_id 2 for calling the NODEModel obj's underlying member method code with example usage: obj.subset(x) and returns: x