private Integer getOrdinalOfKey(Map<Long, VXT> map, Long key) {
		int index = 0;
		for (Long offset : finalVftByOffset.keySet()) {
			if (offset == key) {
				return index;
			}
			index++;
		}
		return map.size();
	}
Updates vftable entries with values from this class that override those of parent classes
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/CppCompositeType.java