Function is_pwr_two 

pub fn is_pwr_two(n: u64) -> bool

Returns true if the given number is a power of two.

use lance_core::utils::bit::is_pwr_two;

assert!(is_pwr_two(1));
assert!(is_pwr_two(2));
assert!(is_pwr_two(1024));
assert!(!is_pwr_two(3));
assert!(!is_pwr_two(1000));