private Address getMetaAddress(Program program) {
		return getDataAddress().subtract(program.getDefaultPointerSize());
	}
Gets the address for the location of the meta data, which is a pointer to the RTTI4
structure for this virtual function table (vftable).
@param program the program containing the vftable being created by this command
@return the address that contains the pointer to the RTTI 4 structure associated with 
the vftable.
Ghidra/Features/MicrosoftCodeAnalyzer/src/main/java/ghidra/app/cmd/data/rtti/CreateVfTableBackgroundCmd.java