Function any_submatch_ignore_ascii_case 

pub fn any_submatch_ignore_ascii_case<T, I>(s: T, sub_iter: I) -> bool
where
    T: AsRef<[u8]>,
    I: IntoIterator,
    <I as IntoIterator>::Item: AsRef<[u8]>,

Returns true if any item produced by sub_iter occurs within s, using ASCII case insensitive comparison.

This is a convenience wrapper around any_contains_ignore_ascii_case.