@Override
  public void registerReferenceProviders(@NotNull final PsiReferenceRegistrar registrar) {
    registrar.registerReferenceProvider(PlatformPatterns.psiElement(GrLiteral.class), new PropertiesReferenceProvider(),
                                        PsiReferenceRegistrar.LOWER_PRIORITY);

    registrar.registerReferenceProvider(GroovyPatterns.stringLiteral().withParent(GrAnnotationNameValuePair.class),
                                        new SpockUnrollReferenceProvider());
  }
@Override
  public void registerReferenceProviders(@NotNull final PsiReferenceRegistrar registrar)