For more info, see <https://github.com/NorfairKing/validity the readme>.
Note: There are companion instance packages for this library:
<https://hackage.haskell.org/package/validity-text validity-text>
<https://hackage.haskell.org/package/validity-path validity-path>
<https://hackage.haskell.org/package/validity-time validity-time>
<https://hackage.haskell.org/package/validity-containers validity-containers>
<https://hackage.haskell.org/package/validity-bytestring
validity-bytestring>.