private static void processNestedFormReference(final XmlTag tag, final PsiReferenceProcessor processor, final PsiPlainTextFile file) {
    final XmlAttribute formFileAttribute = tag.getAttribute(UIFormXmlConstants.ATTRIBUTE_FORM_FILE, null);
    if (formFileAttribute != null) {
      processPackageReferences(file, processor, formFileAttribute);
      processor.execute(new ResourceFileReference(file, getValueRange(formFileAttribute)));
    }
  }
private static void processNestedFormReference(final XmlTag tag, final PsiReferenceProcessor processor, final PsiPlainTextFile file)