Attachment: ICS file with excessive custom properties

type.inbound
and any(filter(attachments,
               .file_type in~ ('ics')
               or .content_type in ("text/calendar", "application/ics")
        ),
        regex.icount(file.parse_text(.).text,
                     '[\r\n]X-[^\r\n]+\x3b\s?[^\r\n]+:\s*[a-f0-9]{32,}'
        ) > 10
)