multiple-libs-2.format

multiple-libs-2.cabal:17:3: The field "visibility" is available only since the Cabal specification version 3.0. This field will be ignored.
cabal-version: 2.0
name:          multiple-libs
version:       0
synopsis:      visible flag only since 3.0
build-type:    Simple

library
    exposed-modules:  ElseIf
    default-language: Haskell2010
    build-depends:    base

library public
    exposed-modules:  ElseIf2
    default-language: Haskell2010
    build-depends:    base