#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::num::NonZero;
fn main() {
    test().unwrap();
}
fn test() -> Option<()> {
    let eight = NonZero::new(8u8)?;
    assert!(eight.is_power_of_two());
    let ten = NonZero::new(10u8)?;
    assert!(! ten.is_power_of_two());
    Some(())
}