You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: resolver.rs
    path of file: ./repos/rstest/rstest_macros/src
    
    the code of the file until where you have to start completion: /// Define `Resolver` trait and implement it on some hashmaps and also define the `Resolver` tuple
/// composition. Provide also some utility functions related to how to create a `Resol
    
        fn resolve_by_use_the_given_name() {
            let data = vec![
                arg_value("pippo", "42"),
                arg_value("donaldduck", "vec![1,2]"),
            ];
            let resolver = get(data.iter());

            assert_eq!(
                resolver.resolve(&ident("pippo")).unwrap().into_owned(),
                "42".ast()
            );
            assert_eq!(
                resolver.resolve(&ident("donaldduck")).unwrap().into_owned(),
                "vec![1,2]".ast()
            );
        }