lann

   /// Gets the missing content of the record.
    pub fn missing_content(&self) -> impl Iterator<Item = (&AnyHash, &MissingContent)> {
        match &self.state {
            PackageRecordState::Sourcing {
                missing_content, ..
            } => Box::new(missing_content.iter()) as Box<dyn Iterator<Item = _>>,
            _ => Box::new(std::iter::empty()) as Box<dyn Iterator<Item = _>>,
        }
    }

lann

// Example generated bindings
mod bindings {
    pub trait Host {
        fn host_func(&mut self);
    }

    pub trait GetHost<T>: Send + Sync + 'static {
        fn get_host<'a>(&self, data: &'a mut T) -> impl Host;
    }