public function testGetSetSignedUp()
 {
     $this->assertFalse($this->instance->isSignedUp());
     $this->assertInstanceOf(Person::class, $this->instance->setSignedUp(true));
     $this->assertTrue($this->instance->isSignedUp());
 }
 /**
  * @param Person $person
  * @return array
  */
 public static function extractRespondent(Person $person)
 {
     return array("title" => $person->getTitle(), "firstName" => $person->getFirstName(), "lastName" => $person->getLastName(), "age" => $person->getAge(), "gender" => $person->getGender(), "emailAddress" => $person->getEmailAddress(), "hasOptedIn" => true === $person->isSignedUp() ? "true" : "false");
 }