Tezos_store_unix.Store_metricstype metrics = {checkpoint_level : Prometheus.Gauge.t;savepoint_level : Prometheus.Gauge.t;caboose_level : Prometheus.Gauge.t;alternate_heads_count : Prometheus.Gauge.t;last_written_block_size : Prometheus.Gauge.t;last_store_merge_time : Prometheus.Gauge.t;maintenance_target : Prometheus.Gauge.t;}val collectors : collectorsval metrics : metrics