/**
  * @covers ::setTriggeringElement
  */
 public function testSetTriggeringElement()
 {
     $triggering_element = ['FOO' => 'BAR'];
     $this->decoratedFormState->setTriggeringElement($triggering_element)->shouldBeCalled();
     $this->assertSame($this->formStateDecoratorBase, $this->formStateDecoratorBase->setTriggeringElement($triggering_element));
 }