cancelSingleRequest :: ForeignPtr SessionImpl -> CorrelationId -> IO ()
cancelSingleRequest s cid =
    withForeignPtr s $ \p ->
          withMaybeCid (Just cid) $ \cidPtr -> do
            rc <- blpapi_Session_cancel p cidPtr 1 nullPtr 0
            failIfBadErrorCode rc
cancelSingleRequest :: ForeignPtr SessionImpl -> CorrelationId -> IO ()
cancelSingleRequest s cid =
    withForeignPtr s $ \p ->
          withMaybeCid (Just cid) $ \cidPtr -> do
            rc <- blpapi_Session_cancel p cidPtr 1 nullPtr 0
            failIfBadErrorCode rc
cancelSingleRequest s cid =
    withForeignPtr s $ \p ->
          withMaybeCid (Just cid) $ \cidPtr -> do
            rc <- blpapi_Session_cancel p cidPtr 1 nullPtr 0
            failIfBadErrorCode rc