class_docstr: Represents an environment variable.
code: def __repr__(self):
      return repr(self.name)
  
file_path: mlflow/mlflow/environment_variables.py
imports: import os
  from pathlib import Path
label_desc: Use image node_id 8 for calling the _EnvironmentVariable obj's underlying member method code with example usage: obj.__repr__() and returns: repr