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: console.rb
    path of file: ./repos/birdwatcher/lib/birdwatcher
    
    the code of the file until where you have to start completion: module Birdwatcher
  class Console
    include Singleton

    DEFAULT_AUTO_COMPLETION_STRINGS = [].freeze
    DB_MIGRATIONS_PATH              = File.expand_path("../../../db/migrations", __FILE__).freeze
    LINE_SEPARATOR             
    
    def load_command_history
      if File.exist?(HISTORY_FILE_LOCATION)
        if File.readable?(HISTORY_FILE_LOCATION)
          File.open(HISTORY_FILE_LOCATION).each_line do |command|
            Readline::HISTORY << command.strip
          end
        else
          warn("Cannot load command history: #{HISTORY_FILE_LOCATION} is not readable")
        end