prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  gradle
   +--api
   |   `--internal
   |       `--initialization
   |           `--loadercache
   +--internal
   |   `--serialize
   |       `--kryo
   `--tooling
       `--internal
           `--provider
               `--serialization
  ```
  
  Convert this description:
  
  type_param_variance2 is a core directory that holds 2 subdirectories: __snapshots__ and libs.
  In the root directory, '__snapshots__' is vacant.
  At the main level, 'libs' groups 1 child directories: __snapshots__.
  Within directory hierarchy 'libs → __snapshots__', '__snapshots__' is barren.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "type_param_variance2\n +--__snapshots__\n `--libs\n     `--__snapshots__", "description": "type_param_variance2 is a core directory that holds 2 subdirectories: __snapshots__ and libs.\nIn the root directory, '__snapshots__' is vacant.\nAt the main level, 'libs' groups 1 child directories: __snapshots__.\nWithin directory hierarchy 'libs \u2192 __snapshots__', '__snapshots__' is barren.\n"}