def METHOD_NAME(self, pickings, configuration):
    """
    Base method to generate the pickings files, one file
    for all pickings
    It returns a list of tuple with a filename, its content
     and a list of pickings ids in the file
    :param browse_record pickings: list of browsable pickings records
    :param browse_record configuration: configuration of
                                        the file to generate
    :return: list of tuple with files to create like:
             [('filename1', file, [picking ids]),
              ('filename2', file2, [picking ids])]
    """
    files = []
    rows = []
    filename = self._get_filename_grouped(configuration)
    filename = self.sanitize_filename(filename)
    for picking in pickings:
        rows += self._get_rows(picking, configuration)
    file_content = self._get_file(rows, configuration)
    files.append((filename, file_content, [p.id for p in pickings]))
    return files