public function test_remove_option()
 {
     $state = new SsoSessionState();
     $state->addOption('aaa', 123);
     $state->addOption('b', 'bbbbb');
     $this->assertEquals(['aaa' => 123, 'b' => 'bbbbb'], $state->getOptions());
     $state->removeOption('aaa');
     $this->assertEquals(['b' => 'bbbbb'], $state->getOptions());
 }