class_docstr: A context manager that suppress the cython
  stack trace in release build.
code: def _fetch_unity_log(self):
      try:
          from .._connect.main import get_server
  
          logfile = get_server().unity_log
          logcontent = "\n======================================="
          logcontent += "\n unity server log location: " + logfile
          logcontent += "\n=======================================\n"
          logcontent += "\nLast 100 lines:\n"
          with open(logfile, "r") as f:
              logcontent += "".join(f.readlines()[-100:])
          logcontent += "\n========= End of server log ===========\n"
          return logcontent
      except:
          return ""
  
file_path: turicreate/src/python/turicreate/_cython/context.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import os
label_desc: Use image node_id 3 for calling the debug_trace obj's underlying member method code with example usage: obj._fetch_unity_log() and returns: logcontent, str