    # 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