Leafo\ScssPhp\Node\Number::offsetUnset PHP Method

    public function offsetUnset($offset)
    {
        if ($offset === 1) {
            $this->dimension = null;
        } elseif ($offset === 2) {
            $this->units = null;
        } elseif ($offset === -1) {
            $this->sourceIndex = null;
        } elseif ($offset === -2) {
            $this->sourceLine = null;
        } elseif ($offset === -3) {
            $this->sourceColumn = null;
        }
    }