prompt: Your task is to convert the following English description into an ASCII tree format.
  
  facebook_fbt_some is a principal directory that encompasses 2 subdirectories: __snapshots__ and flow-typed.
  At the top level, '__snapshots__' has been left empty.
  In the root directory, 'flow-typed' holds 1 folders: __snapshots__.
  At level 2, in directory path 'flow-typed → __snapshots__', The '__snapshots__' collection has no content.
  Back to the top level.
  
  
  Format your response in this style:
  ```
  docs
   +--customization
   +--development
   +--images
   +--samples
   |   `--webpack-getting-started
   |       `--src
   `--usage
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "facebook_fbt_some\n +--__snapshots__\n `--flow-typed\n     `--__snapshots__", "description": "facebook_fbt_some is a principal directory that encompasses 2 subdirectories: __snapshots__ and flow-typed.\nAt the top level, '__snapshots__' has been left empty.\nIn the root directory, 'flow-typed' holds 1 folders: __snapshots__.\nAt level 2, in directory path 'flow-typed \u2192 __snapshots__', The '__snapshots__' collection has no content.\nBack to the top level.\n"}