code: def ustep(self):
          
  
          super(ConvCnstrMODMaskDcpl_Consensus, self).ustep()
          self.U1 += self.AX1 - self.Y1 - self.S
docs: The parent class ystep method is overridden to allow also
          performing the ystep for the additional variables introduced in
          the modification to the baseline algorithm.