@Override
  public PsiReference @NotNull [] getReferencesByElement(@NotNull PsiElement element, final @NotNull ProcessingContext context) {
    LOG.assertTrue(element instanceof XmlAttributeValue);
    XmlAttributeValue value = (XmlAttributeValue)element;

    return new PsiReference[]{new XmlEncodingReference(value, value.getValue(), xmlAttributeValueRange(value), 0)};
  }
@Override
  public PsiReference @NotNull [] getReferencesByElement(@NotNull PsiElement element, final @NotNull ProcessingContext context)