code: def _get(self, key):
      value = getenv(key, "").strip()
      return value or NotSet
  
file_path: clearml/clearml/backend_config/environment.py
imports: from os import getenv, environ
  from .converters import text_to_bool
  from .entry import Entry, NotSet
label_desc: Use image node_id 4 for calling the EnvEntry obj's underlying member method code with example usage: obj._get(key) and returns: unknown