public Address getRtti2Address() throws InvalidDataTypeException {

		checkValidity();
		return getRtti2Address(getProgram(), getAddress());
	}
Gets the address of the RTTI2 that is referred to from an RTTI3 structure that is placed at 
the indicated address.
@return the address of the RTTI2 structure or null.
@throws InvalidDataTypeException if this isn't a valid model at the specified address.
Ghidra/Features/MicrosoftCodeAnalyzer/src/main/java/ghidra/app/cmd/data/rtti/Rtti3Model.java