http://nexus.sonatype.org/oss-repository-hosting.html/vertx-parent/vertx-ext/vertx-ext-parent/vertx-unit: Sonatype helps open source projects to set up Maven repositories on https://oss.sonatype.org/ (Eclipse) 
public interface io.vertx.ext.unit.TestCompletion extends io.vertx.ext.unit.Completion<java.lang.Void>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: io.vertx.ext.unit.TestCompletion
  super_class: java.lang.Object
{
}
Signature: Ljava/lang/Object;Lio/vertx/ext/unit/Completion<Ljava/lang/Void;>;
SourceFile: "TestCompletion.java"
    RuntimeVisibleAnnotations: 
      io.vertx.codegen.annotations.VertxGen()