use std::collections::HashMap;
use std::collections::HashSet;
fn main() {
    {
        let my_data = vec![
            42,
            3.14,
            true,
            false,
            "hello \"world\"",
        ];
        let _ = my_data;
    }
    let my_data;
    my_data = vec![
        42,
        3.14,
        true,
        false,
        "hello \"world\"",
    ];
    let _ = my_data;
}
