}

            tasks.withType(JavaCompile).configureEach {
                options.fork = true
                options.errorprone {
                    check("DoubleBraceInitialization", net.ltgt.gradle.errorprone.CheckSeverity.ERROR)
                }
            }
        """
        file("src/main/java/Test.java") << """
            import java.util.HashSet;
            import java.util.Set;

import org.gradle.api.logging.LogLevel;

import java.util.HashMap;
import java.util.Map;

public final class LogLevelMapping {

    private LogLevelMapping() {
    }

    @SuppressWarnings("DoubleBraceInitialization")
    public static final Map<Integer, LogLevel> ANT_IVY_2_SLF4J = new HashMap<Integer, LogLevel>() {
        {
            // Project is `org.apache.tools.ant.Project`

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

class ExceptionPlaceholder implements Serializable {
    @SuppressWarnings("DoubleBraceInitialization")
    // TODO Use Guava's immutable collections here
    private static final Set<String> CANDIDATE_GET_CAUSES = Collections.unmodifiableSet(
        new HashSet<String>() {{
            add("getCauses");