foldr_RDR, build_RDR, returnM_RDR, bindM_RDR, failM_RDR_preMFP, failM_RDR:: RdrName
foldr_RDR               = nameRdrName foldrName
foldr_RDR, build_RDR, returnM_RDR, bindM_RDR, failM_RDR_preMFP, failM_RDR:: RdrName
foldr_RDR               = nameRdrName foldrName
foldr_RDR               = nameRdrName foldrName