I would be very useful to have preprocessor directives for the compiler (mainly #IF and #ENDIF I think) in the same way that Visual Studio / C# has it. (https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/preprocessor-if)

That will make it very easy to compile the same extension with different functionality like .NET, File access etc. for OnPrem / Cloud or even include additional code that help debugging but is not in the release build