final ModelType<T> type = ModelType.of(source);
        FormattingValidationProblemCollector problems = new FormattingValidationProblemCollector("rule source", type);
        DefaultMethodModelRuleExtractionContext context = new DefaultMethodModelRuleExtractionContext(this, problems);

        // TODO - exceptions thrown here should point to some extensive documentation on the concept of class rule sources

Class <org.gradle.model.internal.inspect.DefaultMethodModelRuleExtractionContext> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (DefaultMethodModelRuleExtractionContext.java:0)