Vespolina pricing declaration based on twig alike syntax

pricing.twig

{% pricingSet "packable_product" %}
    {% element "packaging_cost" %}
    {% element "net_value" %}
    {% element "net_value_with_packaging_cost" %}
    {% element "tax_amount" %}
    {% element "unit_price_with_tax" %}
{% endpricingset %}

{% pricingSet "cart_item" %}
    {% element "total_discount" %}
    {% element "total_value" %}
    {% element "total_tax_amount" %}
    {% element "total_incl_tax" %}
{% endpricingset %}

{% pricingSet "cart" %}
    {% element "total_discount" %}
    {% element "total_value" %}
    {% element "total_tax_amount" %}
    {% element "total_incl_tax" %}
{% endpricingset %}

{% pricingExecution "calculateProduct" %}
    {% step "calculate_packaging"|independent %}
        {% set packaging_cost_factor = 5 %}
        {% set packaging_cost = net_value / 100 * packaging_cost_factor %}
        {% set net_value_with_packaging_cost = packaging_cost + net_value %}
    {% endstep %}
    {% step "calculate_customer_price"|dependent %}
        {# Determine the current tax rate based on the customer (known in the global context) #}
        {% determine_tax_rate into tax_rate %}
        {% set tax_amount = net_value_with_packaging_cost / 100 * tax_rate %}
        {% set unit_price_with_tax = net_value_with_packaging_cost + tax_amount %}
    {% endstep %}
{% endpricingExecution %}

{% pricingExecution "calculateCartItem" %}
    {% step|dependent %}
        {# Load a specific price from a pricing set into the context #}
        {% load_price cartItem.product net_value_with_packaging_cost into total_value %}
        {% determine_discount with cartItem into total_discount %}
        {# Determine the current tax rate based on the customer + cart item #}
        {% determine_tax_rate with cartItem into item_tax_rate %}

        {% set tax_amount = total_value / 100 * item_tax_rate %}
        {% set total_tax_amount = ( total_value - total_discount )  / 100 * item_tax_rate %}
        {% set total_incl_tax = (total_value - total_discount) + total_tax_amount %}
    {% endstep %}
{% endpricingExecution %}

{% pricingExecution "calculateCart" %}
    {% step|dependent %}
        {% for cartItem in cartItems %}
            {# Load the pricing set of cartItem into the context and prefix with "item_" #}
            {% load_prices cartItem "item_" %}
            {% set total_dicount    += item_total_discount %}
            {% set total_value      += item_total_value %}
            {% set total_tax_amount += item_total_tax_amount %}
            {% set total_incl_tax   += item_total_incl_tax %}
        {% endfor %}
    {% endstep %}

{% endpricingExecution %}