WC_Order::get_address_prop PHP Method

    protected function get_address_prop($prop, $address = 'billing', $context = 'view')
    {
        $value = null;
        if (array_key_exists($prop, $this->data[$address])) {
            $value = isset($this->changes[$address][$prop]) ? $this->changes[$address][$prop] : $this->data[$address][$prop];
            if ('view' === $context) {
                $value = apply_filters($this->get_hook_prefix() . $address . '_' . $prop, $value, $this);
            }
        }
        return $value;
    }