Function map_quotes
pub fn map_quotes(data: &QuotesData, now: Instant) -> QuoteExpand description
Maps a quotes message to a [Quote].
The message has one volume, and it is put on both sides (bid and ask). A side the message does
not carry is None, and a missing volume is 0. Whether that volume belongs to the bid, the ask
or the last trade is not verified against the live API.