1pub mod prefabs; 2mod pretreat; 3mod pretreat_fut; 4 5pub use pretreat::{Pretreatment, Treater}; 6pub use pretreat_fut::PretreatFuture; 7 8pub type PreRResult<T, E> = Pretreatment<prefabs::MapError<prefabs::ToRespResult<T>, E>>;