/**
  * @covers ::addCleanValueKey
  */
 public function testAddCleanValueKey()
 {
     $key = 'BAR';
     $this->decoratedFormState->addCleanValueKey($key)->shouldBeCalled();
     $this->assertSame($this->formStateDecoratorBase, $this->formStateDecoratorBase->addCleanValueKey($key));
 }