string(3) "bar"
NULL
object(Test)#1 (1) {
  ["property":protected]=>
  array(1) {
    ["foo"]=>
    string(3) "bar"
  }
}
object(Test)#1 (1) {
  ["property":protected]=>
  array(1) {
    ["foo"]=>
    string(3) "bar"
  }
}