Why can extracting an inline map callback into const render = (item) => item.name introdu…

Why can extracting an inline map callback into const render = (item) => item.name introduce an error under noImplicitAny?

1. The standalone function is checked before a later map call can provide contextual parameter types.
2. Arrow functions cannot receive contextual types.
3. map accepts only named function declarations.
4. const forces every parameter to become any.