Warnings: x "These are useless" y "These are useless" contains "Use `elem` instead." trusted: none require own pkg trusted: False docs: Just module header: Nothing declaration docs: [] arg docs: [] documentation structure: avails: [contains] avails: [x] avails: [y] named chunks: haddock options: language: Nothing language extensions: MonomorphismRestriction RelaxedPolyRec ForeignFunctionInterface ImplicitPrelude ScopedTypeVariables BangPatterns NamedFieldPuns GADTSyntax DoAndIfThenElse ConstraintKinds PolyKinds InstanceSigs StandaloneDeriving DeriveDataTypeable DeriveFunctor DeriveTraversable DeriveFoldable DeriveGeneric DeriveLift TypeSynonymInstances FlexibleContexts FlexibleInstances ConstrainedClassMethods MultiParamTypeClasses ExistentialQuantification EmptyDataDecls KindSignatures GeneralizedNewtypeDeriving PostfixOperators TupleSections PatternGuards RankNTypes TypeOperators ExplicitForAll TraditionalRecordSyntax BinaryLiterals HexFloatLiterals EmptyCase NamedWildCards TypeApplications EmptyDataDeriving NumericUnderscores StarIsType ImportQualifiedPost StandaloneKindSignatures FieldSelectors extensible fields: