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: peer.rs
    path of file: ./repos/tikv/components/raftstore-v2/src/raft
    
    the code of the file until where you have to start completion: // Copyright 2022 TiKV Project Authors. Licensed under Apache-2.0.

use std::{
    cmp, mem,
    sync::Arc,
    time::{Duration, Instant},
};

use collections::{HashMap, HashSet};
use encryption_export::DataKeyMana
    
    pub fn maybe_campaign(&mut self) -> bool {
        if self.region().get_peers().len() <= 1 {
            // The peer campaigned when it was created, no need to do it again.
            return false;
        }

        // If last peer is the leader of the region before split, it's intuitional for
        // it to become the leader of new split region.
        let _ = self.raft_group.campaign();
        true
    }