trait TestTrait {
    fn say_hello(&self);
}

struct TestImplementorOne;

struct TestImplementorTwo;

impl TestTrait for TestImplementorOne{
    fn say_hello(&self){ println!("one");}
}

impl TestTrait for TestImplementorTwo {
    fn say_hello(&self) {println!("two");}
}




fn main(){
    let t = TestImplementorOne;
    t.say_hello();


    let v : Vec<TestTrait> = vec!(TestImplementorOne, TestImplementorTwo, TestImplementorOne);
}