# File lib/fog/rackspace/models/storage/files.rb, line 74
        def head(key, options = {})
          requires :directory
          data = service.head_object(directory.key, key)
          file_data = data.headers.merge({
            :key => key
          })
          new(file_data)
        rescue Fog::Storage::Rackspace::NotFound
          nil
        end