code: protected boolean filterUnwantedArtifacts(Artifact artifact) {
          // filter out maven and plexus stuff (plexus used by maven plugins)
          if (artifact.getGroupId().startsWith("org.apache.maven")) {
              return true;
          } else if (artifact.getGroupId().startsWith("org.codehaus.plexus")) {
              return true;
          }
  
          return false;
      }
docs: Filter unwanted artifacts
  
  @param artifact  the artifact
  @return <tt>true</tt> to skip this artifact, <tt>false</tt> to keep it