public function __construct($extendee, $name, $tag, $reader, $writer, $sizeCalculator, $method = null)
{
$this->tag = $tag;
$this->name = $name;
$this->reader = $reader;
$this->writer = $writer;
$this->method = $method;
$this->extendee = $extendee;
$this->sizeCalculator = $sizeCalculator;
}