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//! The utility crate for the `crow_engine`.
//!
//! # TODO:
//!
//! * impl [`Iterator`] for [`Holder<T>`].
//! * allow `move` for [`SelfRefHolder<T,U>`].
//! [`Holder<T>`]: ../../doc/crow_util/holder/struct.Holder.html
//! [`Iterator`]: https://doc.rust-lang.org/std/iter/trait.Iterator.html
//! [`SelfRefHolder<T,U>`]: ../../doc/crow_util/self_ref/struct.SelfRefHolder.html

pub mod holder;
pub mod self_ref;