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: push_command.rb
    path of file: ./repos/rubygems/lib/rubygems/commands
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative "../command"
require_relative "../local_remote_options"
require_relative "../gemcutter_
    
  def initialize
    super "push", "Push a gem up to the gem server", host: host

    @user_defined_host = false

    add_proxy_option
    add_key_option
    add_otp_option

    add_option("--host HOST",
               "Push to another gemcutter-compatible host",
               "  (e.g. https://rubygems.org)") do |value, options|
      options[:host] = value
      @user_defined_host = true
    end

    @host = nil
  end