variantAttributesRules = new VariantAttributesRules(attributesFactory);
        }
        variantAttributesRules.addAttributesAction(action);
    }

    public void addCapabilitiesAction(VariantAction<? super MutableCapabilitiesMetadata> action) {
        if (capabilitiesRules == null) {
            capabilitiesRules = new ArrayList<>(1);
        }
        capabilitiesRules.add(action);
    }