import NameSet ( NameSet, emptyNameSet, addListToNameSet )
import OccName ( OccName, isTupleOcc_maybe, tcName, dataName, mapOccEnv, occNameFS,
lookupOccEnv, unitOccEnv, extendOccEnv, extendOccEnvList )
import NameSet ( NameSet, emptyNameSet, addListToNameSet )
import OccName ( OccName, isTupleOcc_maybe, tcName, dataName, mapOccEnv, occNameFS,
lookupOccEnv, unitOccEnv, extendOccEnv, extendOccEnvList )