use std::sync::RwLockWriteGuard as StdRwLockWriteGuard;
use std::sync::Condvar as StdCondvar;
-use prelude::HashMap;
+use crate::prelude::HashMap;
#[cfg(feature = "backtrace")]
-use {prelude::hash_map, backtrace::Backtrace, std::sync::Once};
+use {crate::prelude::hash_map, backtrace::Backtrace, std::sync::Once};
#[cfg(not(feature = "backtrace"))]
struct Backtrace{}