Method print_optional_ty

crates/rust/src/interface.rs:1857–1865

(&mut self, ty: Option<&Type>, mode: TypeMode)

    }

    fn print_optional_ty(&mut self, ty: Option<&Type>, mode: TypeMode) {
        match ty {
            Some(ty) => {
                let mode = self.filter_mode_preserve_top(ty, mode);
                self.print_ty(ty, mode)
            }
            None => self.push_str("()"),
        }
    }

    pub fn type_path(&self, id: TypeId, owned: bool) -> String {
        let full_wit_type_name = full_wit_type_name(self.resolve, id);