def mBank_set_tnr(transactions, tag, tag_dict, *args):
matches = tnr_re.search(tag_dict[tag.slug])<EOL>if matches:  <EOL><INDENT>tag_dict['<STR_LIT>'] = matches.groupdict()['<STR_LIT>']<EOL><DEDENT>return tag_dict<EOL>
mBank Collect states TNR in transaction details as unique id for
transactions, that may be used to identify the same transactions in
different statement files eg. partial mt942 and full mt940
Information about tnr uniqueness has been obtained from mBank support,
it lacks in mt940 mBank specification.