class Gem::Commands::YankCommand

def execute
  sign_in
  version   = get_version_from_requirements(options[:version])
  platform  = get_platform_from_requirements(options)
  api_key   = Gem.configuration.rubygems_api_key
  api_key   = Gem.configuration.api_keys[options[:key].to_sym] if options[:key]
  if version then
    if options[:undo] then
      unyank_gem(version, platform, api_key)
    else
      yank_gem(version, platform, api_key)
    end
  else
    say "A version argument is required: #{usage}"
    terminate_interaction
  end
end