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: help_command.rb
    path of file: ./repos/powerstation/powerstation/lib/compiled-jruby/lib/ruby/stdlib/rubygems/commands
    
    the code of the file until where you have to start completion: require 'rubygems/command'

class Gem::Commands::HelpCommand < Gem::Comma
    
  def show_help # :nodoc:
    command = @command_manager[options[:help]]
    if command then
      # help with provided command
      command.invoke("--help")
    else
      alert_error "Unknown command #{options[:help]}.  Try 'gem help commands'"
    end