def download_file(self, file_url, destination_folder=None):
if not destination_folder:<EOL><INDENT>destination_folder = constants.Files.DOWNLOADS_FOLDER<EOL><DEDENT>page_utils._download_file_to(file_url, destination_folder)<EOL>
Downloads the file from the url to the destination folder.
            If no destination folder is specified, the default one is used.
            (The default downloads folder = "./downloaded_files")