No support for flag exporter.log_slow_filter when using pmm-admin to enable mysqld_exporter

The mysqld_exporter used in the pmm installation (for debian) provides a flag exporter.log_slow_filter which suppresses the login of the scrape queries which do not use tmp disk tables or filesort on disk.
I tried to enable the flag for the mysql exporter installed and activated by pmm-admin but there is no option to enable the flag for the exporter itself.
Do I miss something, some config file or whatever, which would allow to enable this option?