code: def save
          unless saved? || @contents.nil? || @name.nil?
            response = client.create_file(@name, @contents, @mime_type)
            unless response.error?
              result = response.result
              @name = result[FIELD_NAME] || File.basename(result[FIELD_URL])
              @url = result[FIELD_URL]
            end
          end
          saved?
        end
docs: Save the file by uploading it to Parse and creating a file pointer.
   @return [Boolean] true if successfully uploaded and saved.