#[cfg(not(feature = "send"))]
mod inner {
use std::cell::{Ref, RefCell, RefMut};
pub type XRc<T> = std::rc::Rc<T>;
pub type XCell<T> = RefCell<T>;
pub type XRef<'a, T> = Ref<'a, T>;
pub type XRefMut<'a, T> = RefMut<'a, T>;
}
#[cfg(feature = "send")]
mod inner {
use std::sync::{Arc, Mutex, MutexGuard};
pub type XRc<T> = Arc<T>;
pub type XCell<T> = Mutex<T>;
pub type XRef<'a, T> = MutexGuard<'a, T>;
pub type XRefMut<'a, T> = MutexGuard<'a, T>; }
pub use inner::*;