/**
  * @covers ::getCacheableArray
  */
 public function testGetCacheableArray()
 {
     $cacheable_array = ['foo' => 'bar'];
     $this->decoratedFormState->getCacheableArray()->willReturn($cacheable_array)->shouldBeCalled();
     $this->assertSame($cacheable_array, $this->formStateDecoratorBase->getCacheableArray());
 }