Initialize the object. Invoked upon construction and wake up.
Overrides EntityNG::init
protected function init() {
parent::init();
// We unset all defined properties, so magic getters apply.
unset($this->cid);
unset($this->uuid);
unset($this->pid);
unset($this->nid);
unset($this->subject);
unset($this->uid);
unset($this->name);
unset($this->mail);
unset($this->homepage);
unset($this->hostname);
unset($this->created);
unset($this->changed);
unset($this->status);
unset($this->thread);
unset($this->node_type);
unset($this->new);
}