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src/backend/backend_trait.rs

@@ -68,6 +68,10 @@ pub(crate) trait Backend {
 
     fn add_packages(&mut self, packages: HashSet<Package>);
 
+    fn show_package_info(&self, package: &Package) -> Result<()> {
+        todo!()
+    }
+
     fn get_unmanaged_packages_sorted(&self) -> Result<Vec<Package>> {
         let installed = self
             .get_explicitly_installed_packages()

src/backend/todo_per_backend.rs

@@ -16,6 +16,10 @@ impl ToDoPerBackend {
         self.0.push(item);
     }
 
+    pub(crate) fn into_iter(self) -> impl Iterator<Item = (Box<dyn Backend>, Vec<Package>)> {
+        self.0.into_iter()
+    }
+
     pub(crate) fn iter(&self) -> impl Iterator<Item = &(Box<dyn Backend>, Vec<Package>)> {
         self.0.iter()
     }