Function deserialize_array 

pub fn deserialize_array<T, U, C>(
    dcx: &DiagCtxt<'_>,
    value: &Spanned<DeValue<'_>>,
    default: &'static [U],
) -> C
where
    T: Deserialize + FromDefault<U>,
    U: Copy,
    C: FromIterator<T> + Extend<T>,