Improves doctest for `declare_types`
Improves doctest for `declare_types`

neon-bindings/neon,rustbridge/neon,neon-bindings/neon,rustbridge/neon,rustbridge/neon,rustbridge/neon,dherman/nanny,rustbridge/neon,dherman/nanny,rustbridge/neon,dherman/nanny,dherman/nanny,neon-bindings/neon,neon-bindings/neon