Function validate_iterator_fields

pub fn validate_iterator_fields(
    caller: &Lowercase<'_>,
    list_type: ListType,
    _data: &Everything,
    sc: &mut ScopeContext,
    vd: &mut Validator<'_>,
    tooltipped: &mut Tooltipped,
    is_svalue: bool,
)

This checks the fields that are only used in iterators. It does not check “limit” because that is shared with the if/else blocks. Returns true iff the iterator took care of its own tooltips