Gem::Commands::MirrorCommand.new

# File tmp/rubies/ruby-3.4.1/lib/rubygems/commands/mirror_command.rb, line 7
def initialize
  super("mirror", "Mirror all gem files (requires rubygems-mirror)")
  begin
    Gem::Specification.find_by_name("rubygems-mirror").activate
  rescue Gem::LoadError
    # no-op
  end
end