int
notmuch_database_dump (notmuch_database_t *notmuch,
const char *output_file_name,
const char *query_str,
dump_format_t output_format,
int
notmuch_database_dump (notmuch_database_t *notmuch,
const char *output_file_name,
const char *query_str,
dump_format_t output_format,