surefire-its/src/test/resources/surefire-1570/com.foo.impl/src/main/java/com/foo/impl/Bar.java

package com.foo.impl;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import com.foo.api.SomeInterface;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 */
public class Bar implements SomeInterface
{
    private static final Logger LOG = LoggerFactory.getLogger( Bar.class );

    private boolean weAreAmongModules;

    @Override
    public void doItNow( Class<?> observer )
    {
        ModuleLayer.boot().modules().forEach( m -> {
            if ( m == observer.getModule() || m == Bar.class.getModule() || m == Logger.class.getModule() )
            {
                weAreAmongModules = true;
            }
        } );
        LOG.info( "" );
        LOG.info( "Let's see if I or SLF4J are among boot layer modules: {}", weAreAmongModules );
        if ( !weAreAmongModules )
        {
            LOG.info( "Maybe we are in child layer? Or this is not module path?" );
        }
    }
}