parameters: (self, transformer)
docstring: Unregister a transformer instance.
docstring_summary: Unregister a transformer instance.
docstring_tokens: Unregister a transformer instance .
function: def unregister_transformer(self, transformer):
          """Unregister a transformer instance."""
          if transformer in self._transformers:
              self._transformers.remove(transformer)
function_tokens: def unregister_transformer ( self , transformer ) : if transformer in self . _transformers : self . _transformers . remove ( transformer )