Yes, sorry for the missing documentation
	Code:
	## plugin::CheckForInstance(guild_id, zone_id)
## returns $instance_id, "EXPIRED", or "FALSE" based on `destroy` field
 On the quest NPC:
	Code:
	# $gu_ID = 1, $zo_ID = 10
my $instExists = plugin::CheckForInstance($gu_ID, $zo_ID);
 -Hate