class_docstr: Represents an environment variable.
code: def __init__(self, name, type_, default):
      self.name = name
      self.type = type_
      self.default = default
  
file_path: mlflow/mlflow/environment_variables.py
imports: import os
  from pathlib import Path
label_desc: Use image node_id 1 to create a new _EnvironmentVariable object  with example: obj = _EnvironmentVariable(name, type_, default)