@file_name.setter<EOL><INDENT>def file_name(self, value):<DEDENT>
if isinstance(value, FileName):<EOL><INDENT>self._file_name = value<EOL><DEDENT>else:<EOL><INDENT>self._file_name = FileName(value)<EOL><DEDENT>
The filename of the attachment

        :param file_name: The filename of the attachment
        :type file_name: FileName, string