code: def createSliders(self, panel):
      self.frequencySliderGroup = SliderGroup(
          panel, label="Frequency f0:", param=self.f0
      )
      self.amplitudeSliderGroup = SliderGroup(
          panel, label=" Amplitude a:", param=self.A
      )
  
imports: import wx
  import numpy
  from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg
  from matplotlib.figure import Figure
label_desc: Use image node_id 3 for calling the FourierDemoFrame obj's underlying member method code with example usage: obj.createSliders(panel) without return types