After saving or checking in a virtual document, what should you do before continuing to use any of
the virtual document nodes?

A.
set the virtual document to null and callIDfSysObject.asVirtualDocument() again

B.
callIDfVirtualDocument.resync() to flush all node information and use
IDfVirtualDocumentNode.getChildCount() to rebuild the cache

C.
use theIDfVirtualDocumentNode.getSelectedObject() method to access objects

D.
callIDfVirtualDocument.resync() to flush all node information and use
IDfVirtualDocument.getRootNode() to rebuild the cache