code: def get_repr(self, blocks):
      h_item = self.proj(blocks[0].srcdata)
      h_item_dst = self.proj(blocks[-1].dstdata)
      return h_item_dst + self.sage(blocks, h_item)
  
imports: import argparse
  import pickle
  import time
  import dgl
  import dgl.function
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.utils.data import DataLoader, IterableDataset
  from ..None import utils
label_desc: Use image node_id 3 for calling the PinSAGEModel obj's underlying member method code with example usage: obj.get_repr(blocks) and returns: unknown