-float URL_READY_ERROR = -1;
-float URL_READY_CLOSED = 0;
-float URL_READY_CANWRITE = 1;
-float URL_READY_CANREAD = 2;
+const float URL_READY_ERROR = -1;
+const float URL_READY_CLOSED = 0;
+const float URL_READY_CANWRITE = 1;
+const float URL_READY_CANREAD = 2;