RwLock miss try_read and try_write method

[Sherlock-Holo]

Version 0.2.13

└── tokio v0.2.13
    └── tokio-macros v0.2.5

Platform

archlinux x64

Subcrates

Description

I try

use tokio::sync::RwLock;

#[tokio::main]
async fn main() {
    let rw_lock = RwLock::new(1);
    
    rw_lock.try_read();
}

It should compile well. But cargo report

method not found in tokio::sync::rwlock::RwLock<{integer}>

I read the doc, RwLock doesn't have try_read or try_write, if I want to try to acquire a read lock or write lock but don't block when acquire failed, what should I do