}

    @Override
    public AttributeMatcher matcher() {
        return withProducer(EmptySchema.INSTANCE);
    }

    @Override
    public CompatibilityRule<Object> compatibilityRules(Attribute<?> attribute) {
        AttributeMatchingStrategy<?> matchingStrategy = strategies.get(attribute);
        if (matchingStrategy != null) {

    }

    /**
     * This class can examine a project to determine which {@link Attribute}s in its schema have {@link org.gradle.api.internal.attributes.CompatibilityRule CompatibilityRule}s or
     * {@link org.gradle.api.internal.attributes.DisambiguationRule DisambiguationRule}s defined.
     */
    private final class ConfigurationRuleScanner {

import org.gradle.api.internal.attributes.AttributeDesugaring;
import org.gradle.api.internal.attributes.AttributesSchemaInternal;
import org.gradle.api.internal.attributes.CompatibilityRule;
import org.gradle.api.internal.attributes.ImmutableAttributes;
import org.gradle.api.internal.attributes.ImmutableAttributesFactory;
import org.gradle.api.specs.Spec;