Method from

utils/src/try_iter.rs:144–146

(InvalidPair(prev, cur): InvalidPair<I>)

impl<I> From<InvalidPair<I>> for (I, I) {
    fn from(InvalidPair(prev, cur): InvalidPair<I>) -> Self {
        (prev, cur)
    }
}

impl<I> From<(I, I)> for InvalidPair<I> {