# File lib/rudy/aws/ec2/instance.rb, line 163 163: def list_group(group=nil, state=nil, inst_ids=[], &each_inst) 164: instances = list_group_as_hash(group, state, inst_ids, &each_inst) 165: instances &&= instances.values 166: instances = nil if instances && instances.empty? # Don't return an empty hash 167: instances 168: end