parentPath = "../pom.xml";
        }

        if (parentPath.length() <= 0) {
            return null;
        }

        return ((ModelSource2) source).getRelatedSource(parentPath);
    }

    private ModelData readParentExternally(
            Model childModel, ModelBuildingRequest request, DefaultModelProblemCollector problems)
            throws ModelBuildingException {

        }

        @Override
        @Nullable
        public Source resolve(@Nonnull String relative) {
            if (modelSource instanceof ModelSource2 ms) {
                return toSource(ms.getRelatedSource(relative));
            } else {
                return null;
            }
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {