tasks.create("foo") {
    tasks.create("bar")
}
----
=====
====

When converting this to use the new API, something surprising happens: `bar` doesn't exist.
The new API only executes configuration actions when necessary,
so the `register()` for task `bar` only executes when `foo` is configured.

====
[.multi-language-sample]
=====
.build.gradle
[source, groovy]
----
tasks.register("foo") {

    server.enqueue(MockResponse(body = "A"))
    server.enqueue(MockResponse(body = "A"))
    val executor = Executors.newCachedThreadPool(threadFactory("HttpOverHttp2Test"))
    val countDownLatch = CountDownLatch(2)
    executor.execute(AsyncRequest("/r1", countDownLatch))
    executor.execute(AsyncRequest("/r2", countDownLatch))
    countDownLatch.await()
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

    }
    try {
      closingFuture.finishToValueAndCloser(new NoOpValueAndCloserConsumer<>(), executor);
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  // Avoid infinite recursion if a closeable's close() method throws RejectedExecutionException and
  // is closed using the direct executor.
  public void testCloseThrowsRejectedExecutionException() throws Exception {

    }
    try {
      closingFuture.finishToValueAndCloser(new NoOpValueAndCloserConsumer<>(), executor);
      fail();
    } catch (IllegalStateException expected) {
    }
  }

  // Avoid infinite recursion if a closeable's close() method throws RejectedExecutionException and
  // is closed using the direct executor.
  public void testCloseThrowsRejectedExecutionException() throws Exception {

    executor.execute(task);
    return task;
  }

  /**
   * Executes {@code runnable} on the specified {@code executor}, returning a {@code Future} that
   * will complete after execution.
   *
   * @throws RejectedExecutionException if the task cannot be scheduled for execution
   * @since 28.2
   */
  public static ListenableFuture<@Nullable Void> submit(Runnable runnable, Executor executor) {

    executor.execute(task);
    return task;
  }

  /**
   * Executes {@code runnable} on the specified {@code executor}, returning a {@code Future} that
   * will complete after execution.
   *
   * @throws RejectedExecutionException if the task cannot be scheduled for execution
   * @since 28.2
   */
  public static ListenableFuture<@Nullable Void> submit(Runnable runnable, Executor executor) {

        List<PluginExecution> executions =
                (List<PluginExecution>) pom.getValue("build/plugins[@artifactId='maven-resources-plugin']/executions");
        assertNotNull(executions);
        assertEquals(4, executions.size());
        assertEquals("default-resources", executions.get(0).getId());
        assertEquals("default-testResources", executions.get(1).getId());

            executer.usingInitScript(initScript);
        }
        executer.withTasks(tasks);
        executer.withArguments(args);
        executer.withEnvironmentVars(environmentVars);
        executer.usingExecutable(executable);
        if (quiet) {
            executer.withQuietLogging();
        }
        if (taskList) {
            executer.withTaskList();
        }

    @CheckForNull // null only for TOMBSTONE
    final Executor executor;

    // writes to next are made visible by subsequent CAS's on the listeners field
    @CheckForNull Listener next;

    Listener(Runnable task, Executor executor) {
      this.task = task;
      this.executor = executor;
    }

    Listener() {
      this.task = null;
      this.executor = null;
    }
  }

    @CheckForNull // null only for TOMBSTONE
    final Executor executor;

    // writes to next are made visible by subsequent CAS's on the listeners field
    @CheckForNull Listener next;

    Listener(Runnable task, Executor executor) {
      this.task = task;
      this.executor = executor;
    }

    Listener() {
      this.task = null;
      this.executor = null;
    }
  }