# File lib/fog/aws/models/compute/image.rb, line 29
        def deregister(delete_snapshot = false)
          service.deregister_image(id)

          if(delete_snapshot && root_device_type == "ebs")
            block_device = block_device_mapping.detect {|block_device| block_device['deviceName'] == root_device_name}
            service.snapshots.new(:id => block_device['snapshotId']).destroy
          else
            true
          end
        end