+ return $ castMsg x
+
+responseForId :: forall m a. (MonadIO m, MonadSessionConfig m, FromJSON a) => LspId -> ConduitParser FromServerMessage m (ResponseMessage a)
+responseForId lid = named "Response for id" $ do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
+ x <- satisfy (maybe False (\z -> z ^. LSP.id == responseId lid) . parser)
+ return $ castMsg x
+
+anyMessage :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
+anyMessage = satisfy (const True)
+
+-- | A stupid method for getting out the inner message.
+castMsg :: FromJSON a => FromServerMessage -> a
+castMsg = fromMaybe (error "Failed casting a message") . decode . encodeMsg