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: column.rs
    path of file: ./repos/rbatis/rbdc-mysql/src/protocol/text
    
    the code of the file until where you have to start completion: use std::str::from_utf8;

use bitflags::bitflags;
use bytes::{Buf, Bytes};

use crate::io::MySqlBufExt;
use crate::protocol::Capabilities;
use rbdc::io::Decode;
use rbdc::{err_protocol, Error};

// https://dev.mysql.com/doc/dev/mysql-server/8.0.12/group__group__cs__column__definition__flags.html

bitflags! {
    //#[derive(serde::Serialize, serde::Deserialize)]
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
    pub struct ColumnFlags: u16 {
        /// Field can't be `NULL`.
        const NOT_NULL = 1;

        /// Field is part of a primary key.
        const PRIMARY_KEY = 2;

        /// Field is part of a unique key.
        const UNIQUE_KEY = 4;

        /// Field is part of a multi-part unique or primary 
    
    fn decode_with(mut buf: Bytes, _: Capabilities) -> Result<Self, Error> {
        let catalog = buf.get_bytes_lenenc();
        let schema = buf.get_bytes_lenenc();
        let table_alias = buf.get_bytes_lenenc();
        let table = buf.get_bytes_lenenc();
        let alias = buf.get_bytes_lenenc();
        let name = buf.get_bytes_lenenc();
        let _next_len = buf.get_uint_lenenc(); // always 0x0c
        let char_set = buf.get_u16_le();
        let max_size = buf.get_u32_le();
        let type_id = buf.get_u8();
        let flags = buf.get_u16_le();
        let decimals = buf.get_u8();

        Ok(Self {
            catalog,
            schema,
            table_alias,
            table,
            alias,
            name,
            char_set,
            max_size,
            r#type: ColumnType::try_from_u16(type_id)?,
            flags: ColumnFlags::from_bits_truncate(flags),
            decimals,
        })
    }