GRTExchange
===========

.. java:class:: public tyche.evolution.operator.GRTExchange
   :inheritance: beast.base.evolution.operator.Exchange


   ExchangeOperator that will appropriately handle if the provided Tree is a GermlineRootTree

   



   .. java:method:: public double doGRTProposal()

      handle proposal appropriately if the provided Tree is a GermlineRootTree

      


   .. java:method:: public double proposal()

      Change the parameter.

      

      :return: Double.NEGATIVE_INFINITY if proposal should not be accepted