See zio.stm.STM *>
See zio.stm.STM <*
See <*> zio.stm.STM <*>
See zio.stm.STM >>=
See zio.stm.STM#fold
See zio.stm.STM#map
Switch from effect F to effect G.
See zio.stm.STM.unit
See zio.stm.STM.unit
Same as filter
See zio.stm.STM#zip
See zio.stm.STM