[SDO Java Question] - Is this checking sufficient?

[Fuhwei Lwo]

In SDOHelperImpl.java, there is a method called isDocumentRoot() described 
below. I remember in some cases the name of DocumentRoot type is called 
"DocumentRoot" that would fail the method. My question is what checking is 
sufficient for identifying a document root type. Thanks.

public boolean isDocumentRoot(Type type)
  {
    return "".equals(SDOExtendedMetaData.INSTANCE.getName((EClassifier)type));
  }