\
    Returns the informal recipients of the cable as (maybe empty) list.

def parse_info_recipients(header, reference_id=None):
    """\
    Returns the informal recipients of the cable as (maybe empty) list.    
    """
    m = _INFO_PATTERN.search(header)
    if not m:
        return []
    to_header = m.group(1)
    return _route_recipient_from_header(to_header, reference_id)