Macro impl_smart_pointer_serializer 

macro_rules! impl_smart_pointer_serializer {
    ($wrapper_name:ident, $pointer_type:ty, $constructor_expr:expr, $trait_name:ident, $try_write_ref:ident, $get_ref:ident, $store_ref:ident, $($impl_type:ty),+) => { ... };
}

Shared serializer implementation for smart pointer wrappers