code: def applyForecastRectifier(self, df):
      df1 = df
      if self.mTimeInfo.mOptions.mForecastRectifier == "relu":
          lForecastColumnName = str(self.mOriginalSignal) + "_Forecast"
          df1[lForecastColumnName] = df1[lForecastColumnName].apply(
              lambda x: max(x, 0)
          )
      return df1
  
imports: import pandas
  import numpy
  from .None import PredictionIntervals
  from .None import Plots
  from .None import Perf
  from .None import Utils
label_desc: Use image node_id 11 for calling the cTimeSeriesModel obj's underlying member method code with example usage: obj.applyForecastRectifier(df) and returns: df1