private Address getPointerToDefinedMemory(Address address) {

		Address pointer = extendedFlatAPI.getPointer(address);
		if (pointer == null) {
			return null;
		}

		if (program.getMemory().getAllInitializedAddressSet().contains(pointer)) {
			return pointer;
		}

		return null;

	}
method to find the main vtable for the given typeinfo and if any, add the
construction ones to the passed in list

@param typeinfo
@param map
@param constructionVtables
@param numBaseRefs
@return address of main vtable for this class
@throws CancelledException
Ghidra/Features/Decompiler/ghidra_scripts/classrecovery/RTTIGccClassRecoverer.java