assertNull(Callables.returning(null).call());

    Object value = new Object();
    Callable<Object> callable = Callables.returning(value);
    assertSame(value, callable.call());
    // Expect the same value on subsequent calls
    assertSame(value, callable.call());
  }

  @J2ktIncompatible
  @GwtIncompatible
  public void testAsAsyncCallable() throws Exception {
    final String expected = "MyCallableString";

			"dir/object1",
			[]string{"object0"},
		},
		// Test 3: remove an object inside a directory and checks if it is deleted
		// but other sibling object in the same directory still exists
		{
			"bucket3",
			[]objectUpload{{"dir/object1", "content"}, {"dir/object2", "content"}},
			"dir/object1",
			[]string{"dir/object2"},
		},

import java.util.TreeMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import junit.framework.TestCase;
import org.junit.Test;

/**
 * Automatically runs sanity checks against top level classes in the same package of the test that
 * extends {@code AbstractPackageSanityTests}. Currently sanity checks include {@link
 * NullPointerTester}, {@link EqualsTester} and {@link SerializableTester}. For example:
 *
 * <pre>

    """
    This is a special class that you can define in a parameter in a dependency to
    obtain the OAuth2 scopes required by all the dependencies in the same chain.

    This way, multiple dependencies can have different scopes, even when used in the
    same *path operation*. And with this, you can access all the scopes required in
    all those dependencies in a single place.

    Read more about it in the

	errLifecycleNoRule       = Errorf("Lifecycle configuration should have at least one rule")
	errLifecycleDuplicateID  = Errorf("Rule ID must be unique. Found same ID for more than one rule")
	errXMLNotWellFormed      = Errorf("The XML you provided was not well-formed or did not validate against our published schema")

        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<FavoriteLog> selectPage(CBCall<FavoriteLogCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<FavoriteLog>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<FavoriteLogCB> cbLambda, EntityRowHandler<FavoriteLog> entityLambda) {

    public ListResultBean<Role> selectList(CBCall<RoleCB> cbLambda) {
        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<Role> selectPage(CBCall<RoleCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<Role>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<RoleCB> cbLambda, EntityRowHandler<Role> entityLambda) {

        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<BadWord> selectPage(CBCall<BadWordCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<BadWord>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<BadWordCB> cbLambda, EntityRowHandler<BadWord> entityLambda) {

        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<CrawlingInfoParam> selectPage(CBCall<CrawlingInfoParamCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<CrawlingInfoParam>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<CrawlingInfoParamCB> cbLambda, EntityRowHandler<CrawlingInfoParam> entityLambda) {

        return facadeSelectList(createCB(cbLambda));
    }

    public PagingResultBean<PathMapping> selectPage(CBCall<PathMappingCB> cbLambda) {
        // #pending same?
        return (PagingResultBean<PathMapping>) facadeSelectList(createCB(cbLambda));
    }

    public void selectCursor(CBCall<PathMappingCB> cbLambda, EntityRowHandler<PathMapping> entityLambda) {