code: def _get_default_pipeline(self, pipeline):
      return (
          Pipeline(
              [
                  ("tfidf", TfidfTransformer(sublinear_tf=True)),
                  ("lr", (RidgeCV())),
              ]
          )
          if pipeline is None
          else pipeline
      )
  
file_path: scattertext/scattertext/continuous/sklearnpipeline.py
imports: import pandas
  from sklearn.feature_extraction.text import TfidfTransformer
  from sklearn.linear_model import RidgeCV, ElasticNetCV, LassoCV
  from sklearn.pipeline import Pipeline
  from scattertext.continuous.coefficientbase import CoefficientBase
label_desc: Use image node_id 2 for calling the RidgeCoefficients obj's underlying member method code with example usage: obj._get_default_pipeline(pipeline) and returns: unknown