if (explanation != null) {
            explanations.add(explanation);
        }
    }

    public void sawVersion() {
        publicationHasVersion = true;
    }

    public void sawDependencyOrConstraint() {
        publicationHasDependencyOrConstraint = true;
    }

    public void addDependencyValidationError(String variant, String errorMessage, String genericExplanation, String suppressor) {

    }

    @Nullable
    private ModuleMetadataSpec.Version versionFor(
        ImmutableVersionConstraint versionConstraint,
        @Nullable String resolvedVersion
    ) {
        checker.sawDependencyOrConstraint();
        if (resolvedVersion == null && isEmpty(versionConstraint)) {
            return null;
        }
        checker.sawVersion();