code: function (error, response) {
              // Destroy the client - frees up resources so that the application
              // stops running
              client.destroy()
              // Display the contents of an error, if one occurred
              if (error) {
                console.log('Request error: ' + error.message)
                // The 'code' property, if set, typically has a string
                // representation of the error code.
                if (error.code) {
                  console.log('Request error code: ' + error.code)
                // If no string representation is available for the error code
                // but the error is a DXL 'RequestError', a numeric error
                // code should be available in the
                // 'dxlErrorResponse.errorCode' property.
                } else if (error.dxlErrorResponse) {
                  console.log('Request error code: ' +
                    error.dxlErrorResponse.errorCode)
                }
              // No error occurred, so extract information from the response. The
              // toString() call converts the payload from a binary Buffer into a
              // string, decoded using UTF-8 character encoding.
              } else {
                console.log('Client received response payload: ' +
                  response.payload.toString())
              }
            }
docs: Handle the response to the request