No way to return a reference for the values method of trait ObjectView

[videni]

Hi , I am trying to integrate this lib as a PHP extension using ext-php-rs.

Implementing liquid views for ZendObject and Zval.

pub struct ZendObjectView<'a>(pub &'a ZendObject);

impl<'a> liquid::ObjectView for ZendObjectView<'a> {

    //.....

    fn values<'k>(&'k self) -> Box<dyn Iterator<Item = &'k dyn ValueView> + 'k> {
        let values = self
            .0
            .get_properties()
            .unwrap()
            .iter()
            .map(|(_, _, v)| {
                // Will not work
                let z = ZvalView(v);

                return &z;
            });

        Box::new(values)
    }
   //....
}

type annotated for above values method

The ZvalView struct

Problems

the signature of the values method need a reference for ValueView, but in my case, I can never return a reference, any way to solve this problem please?