class_docstr: A supervised transformer.
class_docstr_tok: ["A","supervised","transformer","."]
code: def _supervised(self):
      return True
  
imports: from __future__ import annotations
  import abc
  import typing
  from river import base
label_desc: Use image node_id 1 for calling the SupervisedTransformer obj's underlying member method code with example usage: obj._supervised() and returns: True