code: def anti_windup(self, xidx, xmin, xmax):
          
          xidx = matrix(xidx)
          xval = self.x[xidx]
          fval = self.f[xidx]
  
          if isinstance(xmin, (float, int, list)):
              xmin = matrix(xmin, xidx.size, 'd')
  
          if isinstance(xmax, (float, int, list)):
              xmax = matrix(xmax, xidx.size, 'd')
  
          x_above = ageb(xval, xmax)
          f_above = ageb(fval, 0.0)
  
          x_below = aleb(xval, xmin)
          f_below = aleb(fval, 0.0)
  
          above = aandb(x_above, f_above)
          above_idx = index(above, 1.0)
          if len(above_idx) > 0:
              above_xidx = xidx[above_idx]
              self.x[above_xidx] = xmax[above_idx]
              self.zxmax[above_xidx] = 0
  
          below = aandb(x_below, f_below)
          below_idx = index(below, 1.0)
          if len(below_idx) > 0:
              below_xidx = xidx[below_idx]
              self.x[below_xidx] = xmin[below_idx]
              self.zxmin[below_xidx] = 0
  
          idx = list(above_idx) + list(below_idx)
          if len(idx) > 0:
              self.f[xidx[idx]] = 0
              self.ac_reset = True
docs: Anti-windup limiter for state variables.
  
          Resets the limited variables and differential equations.
  
          :param xidx: state variable indices
          :param xmin: lower limit
          :param xmax: upper limit
  
          :type xidx: matrix, list
          :type xmin: matrix, float, int, list
          :type xmax: matrix, float, int, list