Add #[must_use]

src/packages/mod.rs

@@ -38,11 +38,13 @@ pub trait Package {
     fn init(lib: &mut Module);
 
     /// Retrieve the generic package library from this package.
+    #[must_use]
     fn as_shared_module(&self) -> Shared<Module>;
 
     /// Retrieve the generic package library from this package.
     /// This method is deprecated and will be removed in the future.
     /// Use [`as_shared_module`][Package::as_shared_module] instead.
+    #[must_use]
     #[deprecated(since = "0.19.9", note = "use `as_shared_module` instead")]
     fn get(&self) -> Shared<Module> {
         self.as_shared_module()