code: def get_node_types(self):
      return self.node_type_list
  
imports: import os
  import sys
  import time
  import argparse
  import warnings
  import numpy
  from functools import partial
  from paddle.framework import core
  from pgl.utils.logger import log
  from pgl.distributed import helper
label_desc: Use image node_id 11 for calling the DistGraphClient obj's underlying member method code with example usage: obj.get_node_types() and returns: self