# File lib/fog/hp/models/storage/file.rb, line 32
        def copy(target_directory_key, target_file_key)
          requires :directory, :key
          target_directory = service.directories.new(:key => target_directory_key)
          service.put_object(target_directory_key, target_file_key, nil, {'X-Copy-From' => "/#{directory.key}/#{key}" })
          target_directory.files.get(target_file_key)
        end