trait DoSomething {
    fn do_it() -> String {
        "hi".to_string()
    }

    fn me_do_it(&self) -> String {
        let result = <Self as DoSomething>::do_it();
        format!("{}{}", result, "deho".to_string())
    }
}

struct Foo;

impl DoSomething for Foo {}

fn main() {
    let output = Foo::do_it();
    println!("output: {}", output);

    let foo = Foo;
    let output = foo.me_do_it();
    println!("output: {}", output);
}