I want to override the getShippingIncludeTax()
method in the class Mage_Tax_Block_Checkout_Shipping
, this block is defined as a renderer in the config;
<sales>
<quote>
<totals>
<shipping>
<renderer>tax/checkout_shipping</renderer>
</shipping>
</totals>
</quote>
</sales>
I can override a block if needed, but this class doesn't have any Block definition. How do I override this?
NOTE: This is not a typical Block override.