code: def transformDataset(self, df):
      df = self.addVars(df)
      return df
  
imports: import pandas
  import numpy
  from ..None import ForecastEngine
  from .None import Options
  from .None import Perf
  from .None import Utils
  from .None import Plots
  import time
label_desc: Use image node_id 9 for calling the cSignalHierarchy obj's underlying member method code with example usage: obj.transformDataset(df) and returns: df