RouterBuilder with OpenAPIContract parameter example does not compile...

[InfoSec812]

The example in the Vert.x docs for using OpenAPIContract with RouterBuilder does not compile. Here's the code I am using:

package com.redhat.consulting._360;

import io.vertx.core.AbstractVerticle;

import io.vertx.core.Future;
import io.vertx.core.Promise;
import io.vertx.ext.web.openapi.RouterBuilder;
import io.vertx.openapi.contract.OpenAPIContract;

import java.util.logging.Logger;

public class MainVerticle extends AbstractVerticle {

  private static Logger LOG = Logger.getLogger(MainVerticle.class.getName());

  @Override
  public void start(Promise<Void> startPromise) throws Exception {
    String pathToContract = "openapi.yaml";

    OpenAPIContract.from(vertx, pathToContract).onSuccess(contract -> {
      RouterBuilder builder = RouterBuilder.create(vertx, contract);
    });
  }
}

And the error I am getting in response:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project 360: Compilation failure
[ERROR] /home/dphillips/Documents/Personal/Workspace/360/src/main/java/com/redhat/consulting/_360/MainVerticle.java:[21,59] incompatible types: io.vertx.openapi.contract.OpenAPIContract cannot be converted to java.lang.String

Looking at the source for 4.5.12, there is no overloaded method which provides the signature demonstrated in the example.