# File lib/fog/aws/requests/compute/assign_private_ip_addresses.rb, line 39
        def assign_private_ip_addresses(network_interface_id, options={})
          if options['PrivateIpAddresses'] && options['SecondaryPrivateIpAddressCount']
            raise Fog::Compute::AWS::Error.new("You may specify secondaryPrivateIpAddressCount or specific secondary private IP addresses, but not both.")
          end

          response = Excon::Response.new
          response.status = 200
          response.body = {
            'requestId' => Fog::AWS::Mock.request_id,
            'return' => true
          }
          response
        end