public function toBinary($canonicalize = true)
    {
        $offsetOwner = 0;
        $offsetGroup = 0;
        $offsetDacl = 0;
        $offsetSacl = 0;
        $owner = $this->owner ? $this->owner->toBinary() : null;
        $group = $this->group ? $this->group->toBinary() : null;
        $dacl = $this->dacl ? $this->dacl->toBinary($canonicalize) : null;
        $sacl = $this->sacl ? $this->sacl->toBinary() : null;

        /**
         * According the the MS docs, the order of the elements is not important. And indeed, I have found no rhyme or
         * reason as to how the owner/group/sacl/dacl elements are ordered in the security descriptor. As long as they
         * point to the correct offset where the element is located then it will work. But the order seems unpredictable
         * as far as coming from AD/Exchange/etc.
         */
        $offset = 40;
        if ($owner) {
            $offsetOwner = $offset;
            $offset += strlen(bin2hex($owner));
        }
        if ($group) {
            $offsetGroup = $offset;
            $offset += strlen(bin2hex($group));
        }
        if ($sacl) {
            $offsetSacl = $offset;
            $offset += strlen(bin2hex($sacl));
        }
        if ($dacl) {
            $offsetDacl = $offset;
        }

        return pack(
            'C1C1v1V1V1V1V1',
            $this->revision,
            $this->rmControlFlags->getValue(),
            $this->controlFlags->getValue(),
            ($offsetOwner / 2),
            ($offsetGroup / 2),
            ($offsetSacl / 2),
            ($offsetDacl / 2)
        ).$owner.$group.$sacl.$dacl;
    }