code: func NewZFSCollector() (Collector, error) {
  	return &zfsCollector{
  		linuxProcpathBase: "spl/kstat/zfs",
  		linuxZpoolIoPath:  "/*/io",
  		linuxPathMap: map[string]string{
  			"zfs_abd":         "abdstats",
  			"zfs_arc":         "arcstats",
  			"zfs_dbuf":        "dbuf_stats",
  			"zfs_dmu_tx":      "dmu_tx",
  			"zfs_dnode":       "dnodestats",
  			"zfs_fm":          "fm",
  			"zfs_vdev_cache":  "vdev_cache_stats", // vdev_cache is deprecated
  			"zfs_vdev_mirror": "vdev_mirror_stats",
  			"zfs_xuio":        "xuio_stats", // no known consumers of the XUIO interface on Linux exist
  			"zfs_zfetch":      "zfetchstats",
  			"zfs_zil":         "zil",
  		},
  	}, nil
  }
docs: // NewZFSCollector returns a new Collector exposing ZFS statistics.