code: def __repr__(self):
      return f"Adder(value={self._value})"
  
imports: import logging
  import pytest
  from sklearn import datasets
  from sklearn.base import BaseEstimator, TransformerMixin
  from sklearn.model_selection import GridSearchCV
  from sklearn.multiclass import OneVsOneClassifier, OneVsRestClassifier, OutputCodeClassifier
  from sklearn.pipeline import FeatureUnion
  from sklearn.preprocessing import StandardScaler
  from sklearn.svm import LinearSVC
  from sklego.pipeline import DebugPipeline, make_debug_pipeline
label_desc: Use image node_id 5 for calling the Adder obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str