schema.attribute(Attribute.of('a', Flavor))

        when:
        schema.getMatchingStrategy(Attribute.of('someOther', Flavor))

        then:
        def e = thrown(IllegalArgumentException)
        e.message == 'Unable to find matching strategy for someOther'

        when:
        schema.getMatchingStrategy(Attribute.of('picard', Flavor))

        then:
        e = thrown(IllegalArgumentException)

                .collect(Collectors.toList());
        }

        private boolean hasCompatibilityRules(Attribute<?> attribute) {
            final AttributeMatchingStrategy<?> matchingStrategy = attributesSchema.getMatchingStrategy(attribute);
            final DefaultCompatibilityRuleChain<?> ruleChain = (DefaultCompatibilityRuleChain<?>) matchingStrategy.getCompatibilityRules();
            return ruleChain.doesSomething();
        }

    }

    @Override
    public void addConsumerDescriber(AttributeDescriber describer) {
        throw new UnsupportedOperationException();
    }

    @Override
    public <T> AttributeMatchingStrategy<T> getMatchingStrategy(Attribute<T> attribute) {
        throw new UnsupportedOperationException();
    }

    @Override
    public AttributeMatcher matcher() {
        throw new UnsupportedOperationException();
    }

     * @return the matching strategy for this attribute.
     * @throws IllegalArgumentException When no strategy is available for the given attribute.
     */
    <T> AttributeMatchingStrategy<T> getMatchingStrategy(Attribute<T> attribute) throws IllegalArgumentException;

    /**
     * Declares a new attribute in the schema and configures it with the default strategy.

        this.failureDescriberRegistry = ResolutionFailureDescriberRegistry.emptyRegistry(instanceGenerator);
    }

    @Override
    public <T> AttributeMatchingStrategy<T> getMatchingStrategy(Attribute<T> attribute) {
        AttributeMatchingStrategy<?> strategy = strategies.get(attribute);
        if (strategy == null) {

Method <org.gradle.api.attributes.AttributesSchema.getAttributes()> does not have raw return type assignable to org.gradle.api.provider.Provider in (AttributesSchema.java:0)
Method <org.gradle.api.attributes.AttributesSchema.getMatchingStrategy(org.gradle.api.attributes.Attribute)> does not have raw return type assignable to org.gradle.api.provider.Provider in (AttributesSchema.java:0)