It means that you have to pay attention to the value entered here and make sure it still makes sense in a multi project build.
This is because parallel Gradle task execution could result in different PMD tasks from different projects running in parallel.
If multiple PMD tasks execute simultaneously in n projects, then up to a maximum of (n * `thread`) PMD threads could run at the same time.

	}
	return NewRepo(ctx, vcsName, remote)
}

func TestTags(t *testing.T) {
	t.Parallel()

	type tagsTest struct {
		repo   string
		prefix string
		tags   []Tag
	}

	runTest := func(tt tagsTest) func(*testing.T) {
		return func(t *testing.T) {
			t.Parallel()
			ctx := testContext(t)

			r, err := testRepo(ctx, t, tt.repo)
			if err != nil {
				t.Fatal(err)

        }

        parallelWorkAction.writeToBuildFile()
        alternateParallelWorkAction.writeToBuildFile()
        withMultipleActionTaskTypeInBuildScript()
    }

    def "multiple work items can be executed in parallel in #isolationMode (wait for results: #waitForResults)"() {
        given:
        buildFile << """
            task parallelWorkTask(type: MultipleWorkItemTask) {
                isolationMode = '$isolationMode'

func (c *common) Fatalf(format string, args ...any) {
	c.log(fmt.Sprintf(format, args...))
	c.FailNow()
}

// Parallel signals that this test is to be run in parallel with (and only with)
// other parallel tests in this CPU group.
func (t *T) Parallel() {
	t.signal <- (*T)(nil) // Release main testing loop
	<-t.startParallel     // Wait for serial tests to finish
}

   * an edge connecting node A to node B if this {@link Network} has an edge connecting A to B.
   *
   * <p>If this network {@link #allowsParallelEdges() allows parallel edges}, parallel edges will be
   * treated as if collapsed into a single edge. For example, the {@link #degree(Object)} of a node
   * in the {@link Graph} view may be less than the degree of the same node in this {@link Network}.
   */

// Since the Dial to kms-plugin is non-blocking we expect the construction of gRPC service to succeed even when
// kms-plugin is not yet up - dialing happens in the background.
func TestKMSPluginLateStart(t *testing.T) {
	t.Parallel()
	callTimeout := 3 * time.Second
	s := newEndpoint()

	ctx := testContext(t)

	service, err := NewGRPCService(ctx, s.endpoint, callTimeout)
	if err != nil {

/**
 * A class to represent the set of edges connecting an (implicit) origin node to a target node.
 *
 * <p>The {@link #outEdgeToNode} map allows this class to work on networks with parallel edges. See
 * {@link EdgesConnecting} for a class that is more efficient but forbids parallel edges.
 *
 * @author James Sexton
 * @param <E> Edge parameter type
 */
@ElementTypesAreNonnullByDefault
abstract class MultiEdgesConnecting<E> extends AbstractSet<E> {

        forking(true),
        noDaemon(true),
        parallel(true, true),
        configCache(true),
        isolatedProjects(true);

        final public boolean forks;
        final public boolean executeParallel;

        Executer(boolean forks) {
            this(forks, false);
        }

        Executer(boolean forks, boolean parallel) {
            this.forks = forks;

func path(file string) string {
	return filepath.Join("testdata", file)
}

func check(t *testing.T, file string) {
	t.Run(file, func(t *testing.T) {
		testenv.MustHaveGoBuild(t)
		testenv.MustHaveCGO(t)
		t.Parallel()

		contents, err := os.ReadFile(path(file))
		if err != nil {
			t.Fatal(err)
		}
		var errors []*regexp.Regexp
		for i, line := range bytes.Split(contents, []byte("\n")) {

	}
	return true
}

// setParallel marks t as a parallel test if we're in short mode
// (all.bash), but as a serial test otherwise. Using t.Parallel isn't
// compatible with the afterTest func in non-short mode.
func setParallel(t *testing.T) {
	if strings.Contains(t.Name(), "HTTP2") {
		http.CondSkipHTTP2(t)
	}
	if testing.Short() {
		t.Parallel()
	}
}

func runningBenchmarks() bool {