Jackalope\Item::checkState PHP Method

    protected function checkState()
    {
        if ($this->isDirty()) {
            $this->refresh($this->keepChanges);
            // check whether node|property updated state
            if ($this->isDirty()) {
                $this->setState($this->postDirtyState);
            }
            $this->keepChanges = false;
            $this->postDirtyState = -1;
        }
        if ($this->state === self::STATE_DELETED) {
            throw new InvalidItemStateException('Item ' . $this->path . ' is deleted');
        }
        // For all the other cases, the state does not change
    }