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: error.rs
    path of file: ./repos/sqlx/sqlx-postgres/src
    
    the code of the file until where you have to start completion: use std::error::Error as StdError;
use std::fmt::{self, Debug, Display, Formatter};

use atoi::atoi;
use smallvec::alloc::borrow::Cow;

pub(crate) use sqlx_core::error::*;

u
    
    fn is_transient_in_connect_phase(&self) -> bool {
        // https://www.postgresql.org/docs/current/errcodes-appendix.html
        [
            // too_many_connections
            // This may be returned if we just un-gracefully closed a connection,
            // give the database a chance to notice it and clean it up.
            "53300",
            // cannot_connect_now
            // Returned if the database is still starting up.
            "57P03",
        ]
        .contains(&self.code())
    }