public int getVbTableOffset() throws InvalidDataTypeException {
		checkValidity();
		return EHDataTypeUtilities.getIntegerValue(getDataType(), VB_TABLE_OFFSET_ORDINAL,
			getMemBuffer());
	}
Gets the virtual base table offset in this RTTI 4.
@return the vb table offset
@throws InvalidDataTypeException if this isn't a valid model at the specified address.
Ghidra/Features/MicrosoftCodeAnalyzer/src/main/java/ghidra/app/cmd/data/rtti/Rtti4Model.java