[App Config] Modular Library Generation Error

[minhanh-phan]

I am testing the TypeSpec generation for App Configuration service with modular generation. The rest layer generation finishes and the modular generation gives the following error: Error: Unexpected! Inserting syntax kind of FunctionDeclaration, but ExpressionStatement was inserted.

To reproduce: The tspconfig file I use is here and the commit that I use is e873e9aa3ab8682e53c4a344f62797ec6f63f568. The initial generation is in this branch. The "@azure-tools/typespec-ts" version I use is "0.29.0".