code: def setTrailFadePercentage(self, trail):
      self.mTrailFadePercentage = trail
  
imports: from math import ceil
  from PyQt5.QtCore import *
  from PyQt5.QtGui import *
  from PyQt5.QtWidgets import *
label_desc: Use image node_id 29 for calling the Spinner obj's underlying member method code with example usage: obj.setTrailFadePercentage(trail) without return types