use std::sync::atomic::{AtomicU64, Ordering};
static KEY_COUNTER: AtomicU64 = AtomicU64::new(0);
pub fn unique_key(prefix: &str) -> String {
let counter = KEY_COUNTER.fetch_add(1, Ordering::SeqCst);
format!("{}_{}", prefix, counter)
}
#[allow(dead_code)]
pub fn test_value(size: usize) -> String {
"x".repeat(size)
}