private String getModelId() {
        return ModelProblemUtils.toId(sourceModel);
    }

    public void setRootModel(Model rootModel) {
        this.rootModel = rootModel;
    }

    public Model getRootModel() {
        return rootModel;
    }

    public String getRootModelId() {
        return ModelProblemUtils.toId(rootModel);
    }

    public void add(ModelProblem problem) {

                || !artifactId.equals(parent.getArtifactId())) {
            StringBuilder buffer = new StringBuilder(256);
            buffer.append("'parent.relativePath'");
            if (childModel != problems.getRootModel()) {
                buffer.append(" of POM ").append(ModelProblemUtils.toSourceHint(childModel));
            }
            buffer.append(" points at ").append(groupId).append(':').append(artifactId);