want to use Maybe
Install-Package Haskellable -Version 220.127.116.11
dotnet add package Haskellable --version 18.104.22.168
<PackageReference Include="Haskellable" Version="22.214.171.124" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Haskellable --version 126.96.36.199
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