code: def fetch_env_vars():
      """Fetch environmental variables related to orion's managerial data."""
      env_vars = {}
  
      for signif, evars in ENV_VARS.items():
          env_vars[signif] = {}
  
          for var_name, key in evars:
              value = os.getenv(var_name)
  
              if value is not None:
                  env_vars[signif][key] = value
  
      return env_vars
  
imports: import copy
  import getpass
  import hashlib
  import logging
  import os
  import git
  import yaml
  from numpy import inf
  import orion
  import orion.core
  from orion.core.io.orion_cmdline_parser import OrionCmdlineParser
  from orion.core.utils.flatten import unflatten
label_desc: Use image node_id 5 for calling a global function with example usage: fetch_env_vars() and returns: env_vars