//! A hybrid between an [`UnsafeCell`](core::cell::UnsafeCell) and a [`RefCell`](core::cell::RefCell): comes with a [`RefCell`](core::cell::RefCell)-like but unsafe API that panics in test builds (`#[cfg(test)]`) when mutable access is not exclusive, but has no overhead (and allows for UB) in non-test builds.
pub use *;
pub use *;