vertx 3.5.1 missing classes - maven

Question

I started to look into developing with VertX, and I stumbled into problems with some classes that couldnt be resolved. I am posting a simple example.
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>demo.rabbit</groupId>
<artifactId>rabbitmq-client</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-core</artifactId>
<version>3.5.1</version>
</dependency>
</dependencies>
</project>
java code
import io.vertx.core.AbstractVerticle;
import io.vertx.core.AsyncResult;
import io.vertx.core.json.JsonObject;
public class RabbitMQVerticle extends AbstractVerticle
{
#Override
public void start() throws Exception {
AsyncResult ar;
JsonObject jo;
}
}
If I leave it like this, the compiler cannot resolve the AsyncResult and JsonObject imports, and thus cannot resolve both types.
In the external libraries view, those classes appear as part of the io.vertx.core library but the icon next to them indicates that they are missing from the library.
If I replace the vertx.core version to 3.5.0 in the pom file everything works great, switch back to 3.5.1 and nothing works again.
It's also my first time using Maven, what am I missing?
Couldn't find any useful information anywhere on the web

Answer 1

The mentioned classes are parts of the core Vert.x library. Core blocks never get deleted in mature libraries.
Here down the AsyncResult class for example under both versions:
AsyncResult under 3.5.0 version
AsyncResult under 3.5.1 version
Indeed I think even when changing the library version, your project still compiles (using cmd line or using IntelliJ IDEA) but you are facing a UI highlight issue with you IDE.
You can try to:
Re-import all Maven modules using the Maven Projects Tool Window
Clean the system caches and restart the IDE