class_docstr: ModelService wraps up all preprocessing, inference and postprocessing
  functions used by model service. It is defined in a flexible manner to
  be easily extended to support different frameworks.
class_docstr_tok: ["ModelService","wraps","up","all","preprocessing",",","inference","and","postprocessing","functions","used","by","model","service",".","It","is","defined","in","a","flexible","manner","to","be","easily","extended","to","support","different","frameworks","."]
docstr: Ping to get system's health.
  
  Returns
  -------
  String
      A message, "health": "healthy!", to show system is healthy.
docstr_tok: ["Ping","to","get","system","'s","health",".","Returns","--","--","--","-","String","A","message",",","``","health","''",":","``","healthy","!","``",",","to","show","system","is","healthy","."]
code: def ping(self):
      """
      Ping to get system's health.
  
      Returns
      -------
      String
          A message, "health": "healthy!", to show system is healthy.
      """
      # pylint: disable=unnecessary-pass
      pass
  
file_path: serve/ts/model_service/model_service.py
imports: import ast
  import json
  import logging
  import os
  import time
  from abc import ABCMeta, abstractmethod
label_desc: Use image node_id 4 for calling the ModelService obj's underlying member method code with example usage: obj.ping() without return types