Both host_started and heartbeat already contain labels. They're not included in the pattern match for backwards compatibility with earlier versions of the host that didn't/don't emit the labels... but they are pulled out of the data block via Map.get
Both
host_started
andheartbeat
already contain labels. They're not included in the pattern match for backwards compatibility with earlier versions of the host that didn't/don't emit the labels... but they are pulled out of the data block viaMap.get