SharedObject not found without information about +configname=flex flag

Hi,

I'm working on a migration from Flex to Apache Royale. I had an issue with SharedObject and I fixed it but i don't understand why I had an issue and the solution.

first, I follow the syntax as it's written here:
`https://apache.github.io/royale-docs/features/loading-external-data/localsharedobject`
But, i get this error:
`Type was not found or was not a compile-time constant: SharedObject.`

I did some research and i found a stackOverflow post that suggests to import SharedObject:
`import mx.net.SharedObject;`
And then I had this error:
`Definition mx.net.SharedObject could not be found`

If i add `+configname=flex` it compiles and everything is fine.

So, my questions are:
- **What exactly does `+configname=flex`?** I found this on a post: "this option ensures the compiler takes care of any existing flex code" from https://walkingtree.tech/getting-started-apache-royale/
- **Why it doesn't work without `+configname=flex` while i'm following the documentation?**

Thank you

Start with the localsharedobject documentation linked in the report and compare its SharedObject example with the reported compiler errors. Investigate what +configname=flex changes for this example; done when the documentation explains whether the flag is required and why the example behaves differently without it.

Written by the indexing model from the issue text.