@Override
public void registerReferenceProviders(PsiReferenceRegistrar registrar) {
  JavaClassReferenceProvider provider = new JavaClassReferenceProvider();
  provider.setOption(JavaClassReferenceProvider.CLASS_KIND, ClassKind.CLASS);
  registrar.registerReferenceProvider(
      JavaClassQualifiedNameReference.PATTERN, new JavaClassReferenceProvider());
}
 

public BlueprintJavaClassReferenceProvider() {
    this.javaClassReferenceProvider = new JavaClassReferenceProvider();
}