code: def addVars(self, df):
      df[self.mRowNumberColumn] = self.mSignalFrame[
          self.mRowNumberColumn
      ]
      df[self.mTime] = self.mSignalFrame[self.mTime]
      df[self.mNormalizedTimeColumn] = self.mSignalFrame[
          self.mNormalizedTimeColumn
      ]
      df[self.mSignal] = self.mSignalFrame[self.mSignal]
      df[self.mOriginalSignal] = self.mSignalFrame[self.mOriginalSignal]
  
imports: import pandas
  import numpy
  from .None import Utils
  from .None import TimeSeries_Cutting
label_desc: Use image node_id 4 for calling the cTimeInfo obj's underlying member method code with example usage: obj.addVars(df) without return types