$rrd_def_dropped_files = RrdDefinition::make()
    ->addDataset('dropped_files', 'GAUGE', 0)
    ->addDataset('s0dropped_files', 'GAUGE', 0)
    ->addDataset('s1dropped_files', 'GAUGE', 0)
    ->addDataset('s2dropped_files', 'GAUGE', 0)