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public function newInstance()
    {
        if ($this->_prototype === null) {
            $prototype = unserialize(sprintf('O:%d:"%s":0:{}', strlen($this->name), $this->name));
            // fix: see https://github.com/doctrine/doctrine2/pull/1045
            if (!is_object($prototype)) {
                $prototype = $this->reflClass->newInstanceWithoutConstructor();
            }
            $this->_prototype = $prototype;

        }
        return clone $this->_prototype;
    }