code: def function_to_source_link(fn):
      module_name = fn.__module__
      assert module_name.startswith(ROOT_MODULE_NAME)
      path = module_name.replace(".", "/")
      path += ".py"
      line = inspect.getsourcelines(fn)[-1]
      link = (
          "https://github.com/keras-rl/keras-rl/blob/master/"
          + path
          + "#L"
          + str(line)
      )
      return "[[source]](" + link + ")"
  
imports: from __future__ import print_function
  from __future__ import unicode_literals
  import re
  import inspect
  import os
  import shutil
  import sys
  import rl
  import rl.core
  import rl.processors
  import rl.agents
label_desc: Use image node_id 6 for calling a global function with example usage: function_to_source_link(fn) and returns: unknown