    # File lib/fog/aws/requests/compute/associate_dhcp_options.rb, line 35
            def associate_dhcp_options(dhcp_options_id, vpc_id)
              response = Excon::Response.new
              if dhcp_options_id && vpc_id
                response.status = 200
                response.body = {
                  'requestId' => Fog::AWS::Mock.request_id,
                  'return' => true
                }
                response
              else
                if !dhcp_options_id
                  message << 'The request must contain the parameter dhcp_options_id'
                elsif !vpc_id
                  message << 'The request must contain the parameter vpc_id'
                end
                raise Fog::Compute::AWS::Error.new(message)
              end
            end