import STSIntegrator

class STS(STSIntegrator.STSIntegrator):
   def init(self, phys, forces, prop):
      """
      Finalize the propagator.
      """
      return
   def run(self, phys, forces, prop):
      """
      Finalize the propagator.
      """
      return
   def finish(self, phys, forces, prop):
      """
      Finalize the propagator.
      """
      return