docs: def _get_proposed_values(self):
          """
          Method to perform time splitting using leapfrog
          """
          # Take half step in time for updating momentum
          momentum_bar = self.momentum + 0.5 * self.stepsize * self.grad_log_position
  
          # Take full step in time for updating position position
          position_bar = self.position + self.stepsize * momentum_bar
  
          grad_log, _ = self.grad_log_pdf(position_bar, self.model).get_gradient_log_pdf()
  
          # Take remaining half step in time for updating momentum
          momentum_bar = momentum_bar + 0.5 * self.stepsize * grad_log
  
          return position_bar, momentum_bar, grad_log