# File lib/fog/aws/models/iam/policy.rb, line 11
        def save
          requires :id
          requires_one :username, :group_name
          requires :document

          data = if username
                   service.put_user_policy(username, id, document).body
                 else
                   service.put_group_policy(group_name, id, document).body
                 end

          merge_attributes(data)
          true
        end