# File lib/ec2/ec2.rb, line 1080 def describe_availability_zones(list=[]) link = generate_request("DescribeAvailabilityZones", hash_params('ZoneName', list.to_a)) request_cache_or_info :describe_availability_zones, link, QEc2DescribeAvailabilityZonesParser, @@bench, list.nil? || list.empty? rescue Exception on_exception end