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pub use inner::*; #[cfg(feature = "asyncstd")] mod inner { use std::time::Duration; use futures_timer::Delay; pub async fn sleep(duration: Duration) { let delay = Delay::new(duration); delay.await; } } #[cfg(feature = "tokio2")] mod inner { use std::time::Duration; use tokio::time::delay_for; pub async fn sleep(duration: Duration) { delay_for(duration).await; } }