if (fir != null) {
                collectedMappings.putIfAbsent(fir, declaration)
            }
        }
    }
}

private class IrDeclarationPatchingVisitor(private val mapping: Map<FirDeclaration, IrDeclaration>) : IrElementVisitorVoid {
    override fun visitElement(element: IrElement) {
        element.acceptChildrenVoid(this)
    }