Function assimilate 

pub fn assimilate<T>(
    items: impl Perpetuity<Item = T>,
) -> impl Perpetuity<Item = T>

Returns the specified Perpetuity, erasing any further type information.

let _: Vec<i32> = (0..).take(4).collect();

let _: Vec<i32> = iter_utils::assimilate(0..).take(4).collect();