Trait & struct have the same name for a method

same.rs

fn main() {
    let b = B;
    (&b as &A).a();
}

trait A {
    fn a( &self );
}

struct B;
impl B {
    fn a( &self ) {
        println!( "World!");
    }
}

impl A for B {
    fn a( &self ) {
        println!( "Hello" );
        self.a();
    }
}

Prints:

Hello
World!