docstr: Transform a set of features `x`.
  
  Parameters
  ----------
  x
      A dictionary of features.
  
  Returns
  -------
  The transformed values.
docstr_tok: ["Transform","a","set","of","features","`","x","`",".","Parameters","--","--","--","--","--","x","A","dictionary","of","features",".","Returns","--","--","--","-","The","transformed","values","."]
code: def transform_one(self, x: dict) -> dict:
      """Transform a set of features `x`.
  
      Parameters
      ----------
      x
          A dictionary of features.
  
      Returns
      -------
      The transformed values.
  
      """
  
imports: from __future__ import annotations
  import abc
  import typing
  from river import base
label_desc: Use image node_id 5 for calling the BaseTransformer obj's underlying member method code with example usage: obj.transform_one(x) without return types