array(2) {
  [0]=>
  object(JustNik\CoreBundle\Entity\Entry)#2955 (4) {
    ["id":protected]=>
    int(1)
    ["title":protected]=>
    string(7) "title 1"
    ["date":protected]=>
    object(DateTime)#2956 (0) {
    }
    ["markdown":protected]=>
    NULL
  }
  [1]=>
  object(JustNik\CoreBundle\Entity\Entry)#2967 (4) {
    ["id":protected]=>
    int(2)
    ["title":protected]=>
    string(7) "title 2"
    ["date":protected]=>
    object(DateTime)#2968 (0) {
    }
    ["markdown":protected]=>
    NULL
  }
}

$normalizers = array(new GetSetMethodNormalizer());
$serializer = new Serializer($normalizers);
$serializer->normalize($entries[0]);

array(4) {
  ["id"]=>
  int(1)
  ["title"]=>
  string(7) "title 1"
  ["date"]=>
  array(4) {
    ["lastErrors"]=>
    array(4) {
      ["warning_count"]=>
      int(0)
      ["warnings"]=>
      array(0) {
      }
      ["error_count"]=>
      int(0)
      ["errors"]=>
      array(0) {
      }
    }
    ["offset"]=>
    int(3600)
    ["timestamp"]=>
    int(1392058587)
    ["timezone"]=>
    array(3) {
      ["location"]=>
      array(4) {
        ["country_code"]=>
        string(0) ""
        ["latitude"]=>
        float(0)
        ["longitude"]=>
        float(0)
        ["comments"]=>
        NULL
      }
      ["name"]=>
      string(13) "Europe/Berlin"
      ["transitions"]=>
      array(144) {
        [0]=>
        array(5) {
          ["ts"]=>
          int(-1693706400)
          ["time"]=>
          string(24) "1916-05-01T00:00:00+0200"
          ["offset"]=>
          int(7200)
          ["isdst"]=>
          bool(true)
          ["abbr"]=>
          string(4) "CEST"
        }
        [1]=>
        array(5) {
          ["ts"]=>
          int(-1680483600)
          ["time"]=>
          string(24) "1916-10-01T00:00:00+0100"
          ["offset"]=>
          int(3600)
          ["isdst"]=>
          bool(false)
          ["abbr"]=>
          string(3) "CET"
        }
        ..... more entries which times keep increasing with every entry
        [143]=>
        array(5) {
          ["ts"]=>
          int(2140045200)
          ["time"]=>
          string(24) "2037-10-25T02:00:00+0100"
          ["offset"]=>
          int(3600)
          ["isdst"]=>
          bool(false)
          ["abbr"]=>
          string(3) "CET"
        }
      }
    }
  }
  ["markdown"]=>
  NULL
}