Describe the feature

Currently some values have defaults (product SKU, priceValidUntil…). This is handled through setIfEmpty function.

We should allow to opt out from default values if for whatever reason we want to discard a property. So instead of just checking for falseness, we might check for undefined and let users override this.

In that case, remove the property from the output if set to null.

{
  ...
  sku: null, // explicitly left out
}

Additional information

• Would you be willing to help implement this feature?