code: def load_from_plasma(self, index):
      print(
          "Loading {} of size {}".format(
              self.object_ids[index], self.sizes[index]
          )
      )
      current_data = self.client.get(
          self.object_ids[index], timeout_ms=0
      )
      self.current_x = current_data["x"]
      self.current_y = current_data["y"]
      self.current_offset = self.offsets[index]
  
imports: import os
  import types
  import subprocess
  import cloudpickle
  from pyspark.sql import DataFrame
  from torch.utils.data import Dataset, DataLoader
  from zoo.util.utils import get_node_ip
  from zoo.orca.learn.mpi.mpi_runner import MPIRunner
  from zoo.orca.learn.mpi.utils import *
label_desc: Use image node_id 3 for calling the PlasmaNDArrayDataset obj's underlying member method code with example usage: obj.load_from_plasma(index) without return types