}
            if (failure) {
                return results;
            }

            List<Callable<List<ProjectBuildingResult>>> callables = interimResults.stream()
                    .map(interimResult ->
                            (Callable<List<ProjectBuildingResult>>) () -> doBuild(projectIndex, interimResult))
                    .collect(Collectors.toList());

            try {

        Supplier<T> s = asSupplier(supplier);
        if (cache == null) {
            return s.get();
        } else {
            return cache.computeIfAbsent(groupId, artifactId, version, tag, s);
        }
    }

    private static <T> T cache(ModelCache cache, Source source, String tag, Callable<T> supplier) {

 * under the License.
 */
package org.apache.maven.lifecycle.internal.stub;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.TimeUnit;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionService;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

checkThat(Object, org.hamcrest.Matcher); public void checkThat(String, Object, org.hamcrest.Matcher); public Object checkSucceeds(java.util.concurrent.Callable); public void checkThrows(Class, org.junit.function.ThrowingRunnable); } org/junit/rules/ErrorCollector$1.class package org.junit.rules; synchronized class ErrorCollector$1 implements java.util.concurrent.Callable { void ErrorCollector$1(ErrorCollector, String, Object, org.hamcrest.Matcher); public Object call() throws Exception; } org/junit/rules/Ex...