code: def __init__(self, num_nodes: int, size: int, device=None):
      self.size = size
  
      self.neighbors = torch.empty(
          (num_nodes, size), dtype=torch.long, device=device
      )
      self.e_id = torch.empty(
          (num_nodes, size), dtype=torch.long, device=device
      )
      self._assoc = torch.empty(
          num_nodes, dtype=torch.long, device=device
      )
  
      self.reset_state()
  
imports: import copy
  from typing import Callable, Dict, Tuple
  import torch
  from torch import Tensor
  from torch.nn import GRUCell, Linear
  from torch_geometric.nn.inits import zeros
  from torch_geometric.utils import scatter
  from torch_geometric.utils._scatter import scatter_argmax
label_desc: Use image node_id 1 to create a new LastNeighborLoader object  with example: obj = LastNeighborLoader(num_nodes, size, device)