2016:ShaderCompiler
The ShaderCompiler is a part of 2016. The ShaderCompiler is a part of the rendering pipeline, and it compiles ROBLOX's shaders (written in the same format) into every rendering API shader format ever. It's probably the most impressive feat from ROBLOX as you generally need to write DirectX9 specific shaders, then DirectX11 specific shaders, OpenGL specific shaders, etc. It is related to App, which is the core Roblox engine.
There is no need to change any of this code.