pub async fn get_messages_with_time_section<Tz, Tz2>(
    offset: usize,
    before: Option<&DateTime<Tz>>,
    after: Option<&DateTime<Tz2>>
) -> Result<(usize, Vec<Message>)>
where Tz: TimeZone, Tz::Offset: Display, Tz2: TimeZone, Tz2::Offset: Display,
Expand description

messages を after と offset に従って叩いて、totalHits と messages の中身のタプルを返す