KT element: KtNamedFunction
FIR element: FirSimpleFunctionImpl
FIR source kind: KtRealSourceElementKind

FIR element rendered:
public final [ResolvedTo(BODY_RESOLVE)] fun foo(): R|kotlin/Unit| {
    [ResolvedTo(BODY_RESOLVE)] lval i: R|kotlin/Int| = R|/unusedInOriginal|()
}