You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: time.rs
    path of file: ./repos/sqlx/sqlx-mysql/src/types
    
    the code of the file until where you have to start completion: use byteorder::{ByteOrder, LittleEndian};
use bytes::Buf;
use time::macros::format_description;
use time::{Date, OffsetDateTime, PrimitiveDateTime, Time, UtcOffset};

use crate::decode::Decode;
use crate::encode::{Encode, IsNull};
use crate::error::{BoxDynError, UnexpectedNullError};
use crate::protocol::text::ColumnType;

    
    fn size_hint(&self) -> usize {
        // to save space the packet can be compressed:
        match (self.hour(), self.minute(), self.second(), self.nanosecond()) {
            // if hour, minutes, seconds and micro_seconds are all 0,
            // length is 4 and no other field is sent
            (0, 0, 0, 0) => 5,

            // if micro_seconds is 0, length is 7
            // and micro_seconds is not sent
            (_, _, _, 0) => 8,

            // otherwise length is 11
            (_, _, _, _) => 12,
        }
    }