            362..371 'from_iter': fn from_iter<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>, Repeat<Map<impl Fn(&'? f64) -> f64>>>(Repeat<Map<impl Fn(&'? f64) -> f64>>) -> Vec<IntoIterator::Item<Repeat<Map<impl Fn(&'? f64) -> f64>>>>