-//getRealShare :: MTaskDevice MTaskShare -> Shared BCValue
-//getRealShare dev share = sdsLens
-// ("realShare" +++ toString share.identifier)
-// (const $ Just (dev, share.identifier))
-// (SDSRead $ const $ \rs->case find ((==)dev) rs of
-// Nothing = Error $ exception "Device doesn't exist anymore"
-// Just {deviceShares} = case find ((==)share) deviceShares of
-// Nothing = Error $ exception "Share doesn't exist anymore"
-// Just share = Ok share.MTaskShare.value
-// )
-// (SDSWrite $ const $ \rs w->partition ((==)dev) devs of
-// ([], _) = Error $ exception "Device doesn't exist anymore"
-// ([_,_:_], _) = Error $ exception "Multiple matching devices"
-// ([d=:{deviceShares}], devs) = case partition ((==)share) deviceShares of
-// ([], _) = Error $ exception "Share doesn't exist anymore"
-// ([_,_:_], _) = Error $ exception "Multiple matching shares"
-// ([s], shares)
-// # s = {MTaskShare | s & value=val}
-// # d = {MTaskDevice | d & deviceShares=[s:shares]}
-// = Ok $ Just [d:devs])
-// (SDSNotify $ const $ \rs w
-