úÎ ž ^    NoneA persistent version of the  monad. @Run a computation that uses persistent references, and return a : pure value. The rank-2 type offers similar guarantees to  . @Run a computation that uses persistent references, and return a : pure value. The rank-2 type offers similar guarantees to  .        .non-portable (requires rank-2 types for runST) experimentalacfoltzer@gmail.comNone Get the underlying  from an  . Useful for debugging.          .non-portable (requires rank-2 types for runST) experimentalacfoltzer@gmail.comNone     persistent-refs-0.3Data.STRef.PersistentControl.Monad.ST.Persistent$Control.Monad.ST.Persistent.InternalControl.Monad.STSTrunSTref-fd-0.3.0.3Control.Monad.Ref modifyRefwriteRefreadRefnewRefMonadRefSTTrunSTTSTRefasInt modifyRef'Heapheapnext emptyHeapghc-prim GHC.TypesIntnewSTRef readSTRef writeSTRef$fMonadRefSTRefSTT