private Address getNextReferenceTo(Address startAddress, Address refdAddress, int alignment,
			int limit) {

		int offset = alignment;
		while (offset < limit) {
			Address addr = startAddress.add(offset);
			Address referencedAddress = getReferencedAddress(addr);
			if (referencedAddress != null && referencedAddress.equals(refdAddress)) {
				return addr;
			}
			offset += alignment;
		}
		return null;
	}
Method to determine if there are enough zeros to make a null poihnter and no
references into or out of the middle

@param address the given address
@return true if the given address could be a valid null pointer, false if not
Ghidra/Features/Decompiler/ghidra_scripts/classrecovery/Vtable.java