    # File lib/fog/aws/requests/iam/delete_group.rb, line 33
            def delete_group(group_name)
              if data[:groups].has_key? group_name
                if data[:groups][group_name][:members].empty?
                  data[:groups].delete group_name
                  Excon::Response.new.tap do |response|
                    response.status = 200
                    response.body = { 'RequestId' => Fog::AWS::Mock.request_id }
                  end
                else
                  raise Fog::AWS::IAM::Error.new("DeleteConflict => Cannot delete entity, must delete users in group first.")
                end
              else
                raise Fog::AWS::IAM::NotFound.new("The group with name #{group_name} cannot be found.")
              end
            end