private TreeSet<VxtPtrInfo> getPropagatedDirectVirtualBaseVfts() {
		return propagatedDirectVirtualBaseVfts;
	}
Method to do some validation of the class parameters prior to trying to the user trying
to construct or use the class
@return {@code true} if validation passed
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/CppCompositeType.java